Condensate water recovery device and gas water heater

Abstract

The utility model discloses a condensate water recovery device and a gas water heater, and relates to the technical field of water heaters. Wherein the condensate water recovery device comprises a water collecting box, a filtering module and a water pumping structure, and the water collecting box is used for receiving condensate water generated by condensation heat exchange of the equipment main body; the filtering module is arranged in the water collecting box and is used for neutralizing and filtering condensate water in the water collecting box; and the water pumping structure is arranged at the top of the water collecting box and is used for injecting the condensed water filtered in the water collecting box into the water path system. According to the technical scheme, waste of water resources can be avoided, environmental pollution is reduced, meanwhile, the size can be reduced, and the occupied space in the gas water heater is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, and particularly relates to a condensate water recovery device and a gas water heater. Background Art

[0002] A gas water heater, also known as a gas water boiler, refers to a gas appliance that uses gas as fuel, heats water through combustion, and transfers heat to the cold water flowing through the heat exchanger to prepare hot water.

[0003] During the use of a condensing gas water heater, condensate water will be generated. This condensate water is formed after the water vapor in the flue gas condenses, and acidic gases such as CO2 and NOX in the flue gas will dissolve in the condensate water, making it acidic.

[0004] In the water heaters in the related art, this part of the condensate water is directly discharged, which not only wastes water resources but also may cause environmental pollution. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a condensate water recovery device and a gas water heater, aiming to avoid wasting water resources and reduce environmental pollution at the same time.

[0006] To achieve the above purpose, the condensate water recovery device proposed by the utility model is applied to a gas water heater. The gas water heater has a device main body and a water circuit system; the condensate water recovery device includes:

[0007] A water collection box for receiving the condensate water generated by the condensation heat exchange of the device main body;

[0008] A filtering module disposed inside the water collection box for neutralizing and filtering the condensate water in the water collection box; and

[0009] A pumping structure disposed at the top of the water collection box for injecting the filtered condensate water in the water collection box into the water circuit system.

[0010] In an embodiment of the present application, the filtering module is disposed at the bottom of the inner cavity of the water collection box, and at least part of the filtering module is immersed in the condensate water in the water collection box.

[0011] In an embodiment of the present application, a plurality of first partition plates are provided in the water collection box. The plurality of first partition plates divide the inner cavity of the water collection box into a water inlet cavity, a filtering cavity, and a water outlet cavity. The first partition plates are provided with first water passing openings for communicating adjacent two cavities;

[0012] The water inlet cavity is communicated with the device main body through a water inlet pipe;

[0013] The filtering module is built in the filtering cavity;

[0014] The pumping structure is communicated with the water outlet cavity through a water suction pipe.

[0015] In an embodiment of the present application, the first water passing port communicating the water inlet cavity and the filtration cavity is arranged at the top of the corresponding first partition plate;

[0016] And / or, the first water passing port communicating the filtration cavity and the water outlet cavity is arranged at the top of the corresponding first partition plate.

[0017] In an embodiment of the present application, a plurality of second partition plates are further arranged in the water collecting box, the plurality of second partition plates divide the filtration cavity into at least two sub-filtration cavities, and a second water passing port communicating two adjacent sub-filtration cavities is arranged at the bottom of the second partition plate;

[0018] The second water passing ports of two adjacent second partition plates are arranged in a staggered manner.

[0019] In an embodiment of the present application, the top of the filtration cavity is covered with a cover plate, a gap is formed between the cover plate and the inner top wall of the water collecting box, and the gap is communicated with both the water inlet cavity and the water outlet cavity;

[0020] The cover plate is provided with a plurality of liquid inlet holes communicating the gap and the filtration cavity.

[0021] In an embodiment of the present application, the pumping structure includes:

[0022] A water pump, arranged at the top of the water collecting box, and the inlet end of the water pump is communicated with the inner cavity of the water collecting box through a water suction pipe;

[0023] A control valve, arranged at the top of the water collecting box, and the outlet end of the control valve is communicated with the inner cavity of the water collecting box; and

[0024] A three-way pipe, one end of which is connected to the outlet end of the water pump, one end is connected to the inlet end of the control valve, and the other end is connected to the waterway system.

[0025] In an embodiment of the present application, a filter screen is arranged at the inlet end of the water suction pipe;

[0026] A sewage outlet is arranged at the bottom of the water collecting box, and the sewage outlet and the projection of the inlet end of the water suction pipe on the bottom wall of the water collecting box at least partially overlap.

[0027] In an embodiment of the present application, the condensate recovery device further includes a check valve, and the check valve is arranged on the connection pipeline between the pumping structure and the waterway system;

[0028] And / or, the condensate recovery device further includes a pressure balance port provided at the top of the water collection box, and the pressure balance port communicates the outside with the inner cavity of the water collection box;

[0029] And / or, the condensate recovery device further includes a liquid level detection module for detecting the water level in the water collection box, and the liquid level detection module is electrically connected to the water pumping structure.

[0030] In an embodiment of the present application, the water collection box includes a box body and an upper cover. The top of the box body is open, and the upper cover is covered on the top of the box body to form a water storage cavity. The upper cover is hermetically connected to the box body;

[0031] The filtration module is provided in the box body, and the water pumping structure is installed on the upper cover.

[0032] To achieve the above object, the present application further provides a gas water heater, which has a water circuit system, including:

[0033] A device main body, including a main heat exchanger for performing primary heat exchange on the flue gas after combustion and a condensing heat exchanger for performing secondary heat exchange on the flue gas after primary heat exchange; and

[0034] The above-mentioned condensate recovery device is used to recover the condensate generated by the condensing heat exchanger and inject the collected and neutralized and filtered condensate into the water circuit system.

[0035] In the condensate recovery device of the technical solution of the present utility model, by using a water collection box to receive the condensate generated by the condensation heat exchange of the device main body of the gas water heater, and then neutralizing and filtering the condensate through the filtration module in the water collection box, the neutralized and filtered condensate is pumped out by the water pumping structure and injected into the water circuit system of the gas water heater for reuse, so as to avoid wasting water resources and reduce environmental pollution at the same time. In addition, by placing the filtration module inside the water collection box and setting the water pumping structure at the top of the water collection box, the overall structural volume of the condensate recovery device can be reduced, and the occupied space in the gas water heater can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model 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 only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0037] Figure 1 It is a schematic structural diagram of an embodiment of the gas water heater of the present utility model;

[0038] Figure 2Schematic structural diagram of an embodiment of the condensate water recovery device of the present utility model;

[0039] Figure 3 Schematic structural diagram of the condensate water recovery device of the present utility model from another perspective;

[0040] Figure 4 Exploded structural diagram of an embodiment of the condensate water recovery device of the present utility model;

[0041] Figure 5 Exploded structural diagram of the condensate water recovery device of the present utility model from another perspective;

[0042] Figure 6 Schematic appearance structure diagram of the water collecting box in the embodiment of the present utility model;

[0043] Figure 7 Schematic cooperation diagram of the water inlet pipe, water collecting box and filtering module in the embodiment of the present utility model;

[0044] Figure 8 Schematic inner cavity structure diagram of the water collecting box in the embodiment of the present utility model;

[0045] Figure 9 Top view of the water collecting box in the embodiment of the present utility model;

[0046] Figure 10 is Figure 9 Cross-sectional view taken along M-M in

[0047] Figure 11 is Figure 9 Cross-sectional view taken along N-N in

[0048] Explanation of the reference numerals in the drawings:

[0049] Label Name Label Name 100 Condensate recovery device 31a Inlet end of the water pump 1 Water collecting box 31b Outlet end of the water pump 11 Box body 32 Control valve 12 Upper cover 32a Inlet end of the control valve 13 First partition board 32b Outlet end of the control valve 13a First water passing port 33 Three-way pipe 14 Second partition board 34 Filter screen 14a Second water passing port 4 Check valve 15 Cover plate 5 Liquid level detection module 15a Liquid inlet hole A Water inlet cavity 16 Water inlet pipe B Filtering cavity 17 Water extraction pipe B1 Sub-filtering cavity 18 Sewage discharge cover C Water outlet cavity 101 Pressure balance port 200 Main heat exchanger 102 Sewage discharge port 300 Condensing heat exchanger 103 Installation port for the outlet end of the control valve 410 Cold water inlet pipe 104 Installation port for the liquid level probe 420 Hot water outlet pipe 2 Filtering module 500 Burner 3 Water extraction structure 600 Fan 31 Water pump

[0050] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0051] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0052] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0053] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously.

[0054] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0055] After a conventional gas water heater undergoes primary heat exchange, it usually generates medium-temperature flue gas with a temperature generally around 180 °C. The medium-temperature flue gas has a relatively high content of CO2 and NOX, and contains water vapor with a relatively high heat energy content. If directly discharged, it not only pollutes the environment but also causes a large amount of heat energy loss. In order to avoid environmental pollution and heat energy waste caused by direct flue gas discharge, a condensing gas water heater has emerged. A condensing gas water heater uses a condensing heat exchange device for secondary heat exchange, preheats water, recovers the latent heat of the medium-temperature flue gas, improves the utilization rate of gas, and at the same time greatly reduces the temperature of the flue gas discharged outside the machine. Since the water vapor in the medium-temperature flue gas will condense into liquid condensate while releasing latent heat, and acidic gases such as CO2 and NOX in the flue gas will dissolve in the condensate, making it corrosive. Therefore, a condensing gas water heater usually needs to be provided with a condensate drain pipe to discharge the acidic condensate outside the machine, and a neutralizer is also used to remove the corrosiveness of the condensate before discharge.

[0056] In the related art, a condensate recovery device is used to recover and process the condensate. By setting a filtering device outside the water collection box, the condensate of the condensing heat exchanger enters the water collection box for storage after being neutralized and filtered, and then the water is introduced into the water circuit system of the water heater through a pumping device to achieve the recovery of the condensate. However, in this solution, since the filtering device is set outside the water collection box, the overall volume of the condensate recovery device is relatively large, occupying too much space of the gas water heater.

[0057] Based on this, as Figure 1 , the present utility model provides a condensate water recovery device 100, which is applied to a gas water heater. The gas water heater is a condensing gas water heater. The condensate water recovery device 100 is used to receive the condensate water generated by the condensing heat exchanger 300, and inject the collected and filtered condensate water into the water circuit system of the gas water heater to avoid waste of water resources and reduce environmental pollution at the same time. At the same time, by integrating the filtering module 2 into the water collection box 1, the overall structural volume of the condensate water recovery device 100 can be reduced, and the occupied space in the gas water heater can be reduced. The structure of the condensate water recovery device 100 will be described below by way of examples.

[0058] As Figures 1 to 5 shown, the condensate water recovery device 100 includes a water collection box 1, a filtering module 2 and a pumping structure 3.

[0059] The water collection box 1 is used to receive the condensate water generated by the condensation heat exchange of the equipment main body; the filtering module 2 is arranged inside the water collection box 1 and is used to neutralize and filter the condensate water in the water collection box 1; the pumping structure 3 is arranged on the top of the water collection box 1 and is used to inject the filtered condensate water in the water collection box 1 into the water circuit system.

[0060] In this embodiment, the water collection box 1 serves to receive the condensate water generated by the heat exchange of the equipment main body of the gas water heater. It can be understood that the water collection box 1 can be directly arranged below the equipment that generates condensate water, so that the condensate water flows directly into the water collection box 1 under the action of gravity; or the condensate water can also be diverted into the water collection box 1 through the water inlet pipe 16. In this way, the installation position of the water collection box 1 can be determined according to the internal structure layout of the whole gas water heater. The specific structural shape of the water collection box 1 can be determined according to the actual situation. For example, it can be a square body, a cylinder, a cuboid or other special-shaped structures, as long as it can play the role of receiving and storing water.

[0061] The filtering module 2 is arranged inside the water collection box 1. It can be understood that an immersion filter element can be used to neutralize and filter the condensate water received in the water collection box 1. For example, the filtering module 2 can adopt a granular filter element containing magnesium oxide, an ion exchange resin filter element, etc. By arranging the filtering module 2 inside the water collection box 1, the filtering module 2 can continuously neutralize and filter the water in the water collection box 1. Compared with the flow-through filtering method, the contact time between the filtering module 2 and the condensate water in this embodiment is longer, and the neutralization and filtering effect is more thorough. In addition, by arranging the filtering module 2 inside the water collection box 1, compared with the method of arranging the filtering module 2 outside the water collection box 1 in the related art, the overall volume of the condensate water recovery device 100 can be reduced.

[0062] The pumping structure 3 is provided at the top of the water collection box 1, and is used to pump out the water in the water collection box 1 after neutralization and filtration and inject it into the water circuit system of the gas water heater for secondary utilization. It can be understood that the water outlet end of the pumping structure 3 can be connected to the water inlet pipe in the water circuit system, or can be connected to the water outlet pipe, or can also be connected to the water pipe in the middle of the water circuit system. The specific connection position here can not be limited, as long as the secondary utilization of the condensed water can be realized. In actual application, the specific structure of the pumping structure 3 can not be limited. For example, it can be a water pump or other negative pressure devices (such as a negative pressure device composed of a pipeline and an impeller). When the water pump is selected for the pumping structure 3, the type of the water pump can be a diaphragm pump. By arranging the pumping structure 3 at the top of the water collection box 1, the overall lateral dimension of the condensed water recovery device 100 can be reduced, and it is more convenient for users to install the condensed water recovery device 100.

[0063] In summary, in the condensed water recovery device 100 of the technical solution of the present utility model, the water collection box 1 is adopted to receive the condensed water generated by the condensation heat exchange of the equipment main body of the gas water heater, and then after the condensed water is neutralized and filtered by the filtration module 2 in the water collection box 1, the pumping structure 3 pumps out the neutralized and filtered condensed water and injects it into the water circuit system of the gas water heater for re - utilization, so as to avoid wasting water resources and reduce environmental pollution at the same time. In addition, by arranging the filtration module 2 inside the water collection box 1 and the pumping structure 3 at the top of the water collection box 1, the overall structural volume of the condensed water recovery device 100 can be reduced, and the occupied space in the gas water heater can be reduced.

[0064] In an embodiment of the present application, as Figure 7 and Figure 10 , the filtration module 2 is arranged at the bottom of the inner cavity of the water collection box 1, and at least part of the filtration module 2 is immersed in the condensed water in the water collection box 1.

[0065] It can be understood that under the action of gravity, the condensed water will first be stored at the bottom of the inner cavity of the water collection box 1. In this embodiment, by arranging the filtration module 2 at the bottom of the inner cavity of the water collection box 1, the filtration module 2 can be at least partially immersed in the condensed water in the water collection box 1, that is, the filtration module 2 can always be in contact with the condensed water in the water collection box 1 to achieve the neutralization and filtration effect.

[0066] It should be noted that the degree of immersion of the filtration module 2 can be determined according to the depth of the condensed water actually collected in the water collection box 1. For example, when the amount of collected condensed water is small, part of the filtration module 2 can be immersed; when the amount of collected condensed water is large, the whole filtration module 2 can be immersed.

[0067] In an embodiment of the present application, as Figures 7 to 10, several first partition plates 13 are arranged in the water collecting box 1, and the several first partition plates 13 divide the inner cavity of the water collecting box 1 into a water inlet cavity A, a filtering cavity B, and a water outlet cavity C. The first partition plate 13 is provided with a first water passing port 13a for communicating two adjacent cavities; the water inlet cavity A is communicated with the equipment main body through a water inlet pipe 16; the filtering module 2 is built in the filtering cavity B; the water pumping structure 3 is communicated with the water outlet cavity C through a water pumping pipe 17.

[0068] In this embodiment, the inner cavity of the water collecting box 1 is divided into a water inlet cavity A, a filtering cavity B, and a water outlet cavity C which are sequentially communicated by several first partition plates 13. Among them, the water inlet cavity A is communicated with the equipment main body through a water inlet pipe 16, the filtering module 2 is arranged in the filtering cavity B, and the water outlet cavity C is communicated with the water pumping structure 3 through a water pumping pipe 17. Therefore, the condensed water generated by the equipment main body will flow into the water inlet cavity A through the water inlet pipe 16, and then flow into the filtering cavity B through the first water passing port 13a between the water inlet cavity A and the filtering cavity B. After being neutralized and filtered by the filtering module 2, it flows into the water outlet cavity C through the first water passing port 13a between the filtering cavity B and the water outlet cavity C. Finally, the water pumping structure 3 pumps out the water in the water outlet cavity C and injects it into the water path system of the gas water heater. Through the design of sequentially communicating the water inlet cavity A, the filtering cavity B, and the water outlet cavity C in this embodiment, it is ensured that the condensed water needs to be filtered before flowing into the water outlet cavity C after entering the water collecting box 1, avoiding the situation that the condensed water is pumped out without being neutralized and filtered.

[0069] It can be understood that the number of the first partition plates 13 can be determined according to the actual situation. For example, it can be 2, 3 or more. The shape and structure of the first partition plate 13 can also be determined according to the actual situation. For example, it can be a straight plate, an annular plate, an S-shaped plate, a right-angle plate or other special-shaped plates, as long as the inner cavity of the water collecting box 1 can be divided into a water inlet cavity A, a filtering cavity B, and a water outlet cavity C. Correspondingly, the cavity shapes of the water inlet cavity A, the filtering cavity B, and the water outlet cavity C can be determined according to the inner cavity shape of the water collecting box 1 and the shape of the first partition plate 13, and the specific details can be not limited here.

[0070] It can be understood that the position of the first water passing port 13a can be determined according to the actual situation. For example, it can be set at the top, bottom or middle of the corresponding first partition plate 13.

[0071] In one embodiment, as Figure 7 and Figure 8, the first water passing port 13a connecting the water inlet chamber A and the filtration chamber B is provided at the top of the corresponding first partition plate 13. With such an arrangement, the condensed water entering the water inlet chamber A from the water inlet pipe 16 will first accumulate in the water inlet chamber A until it reaches the top of the first partition plate 13 and then flows into the filtration chamber B through the first water passing port 13a. Thus, some particulate impurities in the condensed water can be deposited at the bottom of the water inlet chamber A, playing a role in preliminary filtration. Optionally, the water inlet pipe 16 extends into the lower region of the water inlet chamber A from the top of the water collecting box 1.

[0072] In one embodiment, as Figure 7 and Figure 8 , the first water passing port 13a connecting the filtration chamber B and the water outlet chamber C is provided at the top of the corresponding first partition plate 13. With such an arrangement, the condensed water in the filtration chamber B needs to accumulate to a sufficient height before flowing into the water outlet chamber C through the first water passing port 13a, extending the contact time between the condensed water and the filtration module 2, making the neutralization and filtration of the condensed water more thorough, and further improving the filtration effect. At the same time, since some particulate impurities may be generated during the filtration process, by setting the first water passing port 13a connecting the filtration chamber B and the water outlet chamber C at the top of the corresponding first partition plate 13, the particulate impurities generated during the filtration process can be prevented from entering the water outlet chamber C.

[0073] In actual application, the first water passing port 13a connecting the water inlet chamber A and the filtration chamber B and the first water passing port 13a connecting the filtration chamber B and the water outlet chamber C can both be set at the top of the corresponding first partition plate 13. In this way, on the one hand, preliminary filtration can be carried out in the water inlet chamber A, and on the other hand, the flow path of the condensed water can be extended, prolonging the soaking time of the condensed water on the filtration module 2, enabling the condensed water to fully contact the filtration module 2, and achieving a better filtration effect.

[0074] To further improve the filtration effect, as Figure 8 , in one embodiment, a plurality of second partition plates 14 are further provided in the water collecting box 1, and the plurality of second partition plates 14 divide the filtration chamber B into at least two sub-filtration chambers B1, and a second water passing port 14a connecting adjacent two sub-filtration chambers B1 is provided at the bottom of the second partition plate 14.

[0075] It can be understood that the filtering chamber B is divided into at least two sub-filtering chambers B1 by a plurality of second partition plates 14, and two adjacent sub-filtering chambers B1 are communicated through a second water passing port 14a. After the condensed water enters the first sub-filtering chamber B1 from the water inlet chamber A, it first contacts the filtering module 2 in the first sub-filtering chamber B1 and undergoes neutralization filtration, and then enters the adjacent second sub-filtering chamber B1 through the second water passing port 14a to contact the filtering module 2 in the second sub-filtering chamber B1 and undergo neutralization filtration. Then, it enters the adjacent third sub-filtering chamber B1 to contact the filtering module 2 in the third sub-filtering chamber B1 and undergo neutralization filtration, and so on, until it enters the water outlet chamber C through the first water passing port 13a. Such a design can extend the flow path of the condensed water in the filtering chamber B, extend the contact time between the condensed water and the filtering module 2, and improve the filtering effect.

[0076] In this embodiment, by arranging the second water passing port 14a at the bottom of the second partition plate 14, even when the amount of condensed water is small, it can flow in at least two sub-filtering chambers B1, contact more filtering modules 2, and achieve a better filtering effect.

[0077] Furthermore, as Figure 8 , the second water passing ports 14a of two adjacent second partition plates 14 are arranged staggeredly.

[0078] By arranging the second water passing ports 14a of two adjacent ones staggeredly, the flow path of the condensed water can be further extended, and the filtering effect is further improved.

[0079] As an example, the second water passing ports 14a of two adjacent ones can be respectively arranged at the diagonal positions of the corresponding sub-filtering chambers B1. At this time, the projections of the two second water passing ports 14a on the same second partition plate 14 are respectively located on the opposite sides of the second partition plate 14, so that the flow path of the condensed water is longer and a better filtering effect is achieved.

[0080] In actual application, the positions of the second water passing port 14a and the first water passing port 13a of the sub-filtering chamber B1 communicated with the water outlet chamber C can also be improved, so that the second water passing port 14a and the first water passing port 13a are respectively arranged on the opposite sides of the sub-filtering chamber B1 to further extend the flow path of the condensed water.

[0081] It can be understood that the structural shape of the first water passing port 13a can be determined according to the actual situation. For example, it can be a notch, a through hole, etc. Correspondingly, the second water passing port 14a can also be a notch, a through hole, etc.

[0082] In an embodiment of the present application, as Figure 4 、 Figure 5 and Figure 7The top of the filter chamber B is sealed with a cover plate 15, and there is a gap between the cover plate 15 and the top inner wall of the water collecting box 1, and the gap is connected to the water inlet chamber A and the water outlet chamber C.

[0083] In this embodiment, by setting a cover plate 15 on the top of the filter chamber B, the filter module 2 in the filter chamber B is limited, and the filtered particles of the filter module 2 can be prevented from entering the water outlet chamber C. By setting a gap between the cover plate 15 and the top inner wall of the water collecting box 1, and the gap can connect the water inlet chamber A and the water outlet chamber C, when the filter module 2 in the filter chamber B is blocked, the water flow can still flow into the water outlet chamber C through the gap above the cover plate 15, and will not flow back into the condensate drainage pipe, or even overflow from the smoke pipe position, causing the machine to fail to work normally, thereby making the gas water heater 1 using the condensate recovery device 100 more reliable.

[0084] Furthermore, the cover plate 15 is provided with a plurality of liquid inlet holes 15a communicating with the gap and the filter cavity B.

[0085] By setting a liquid inlet hole 15a on the cover plate 15, the water flowing through the gap can enter the filter chamber B through the liquid inlet hole 15a. In this way, when the amount of condensed water is large and part of the water does not have time to enter the filter chamber B from the first water outlet 13a, the water can enter the filter chamber B through the gap from the liquid inlet hole 15a of the cover plate 15 for filtration.

[0086] In one embodiment of the present application, Figures 1 to 5 The pumping structure 3 includes a water pump 31, a control valve 32 and a three-way pipe 33. The water pump 31 is arranged at the top of the water collecting box 1, and the inlet end 31a of the water pump 31 is connected to the inner cavity of the water collecting box 1 through the pumping pipe 17; the control valve 32 is arranged at the top of the water collecting box 1, and the outlet end 32b of the control valve 32 is connected to the inner cavity of the water collecting box 1; one end of the three-way pipe 33 is connected to the outlet end 31b of the water pump 31, one end is connected to the inlet end 32a of the control valve 32, and the other end is connected to the water system.

[0087] This embodiment illustrates the structure of the pumping structure 3, and the water pump 31 plays the role of driving the pumping. The inlet end 31a of the water pump 31 is connected to the inner cavity of the water collecting box 1 through the pumping pipe 17. Optionally, the pumping pipe 17 extends into the lower cavity of the water outlet cavity C to prevent the water pump 31 from pumping dry. The outlet end 31b of the water pump 31 is connected to the three-way pipe 33, and the other two interfaces of the three-way pipe 33 are respectively connected to the control valve 32 and the water system. The control valve 32 is used to control the switching of the passage between the outlet end 31b of the water pump 31 and the water system and the inner cavity of the water collecting box 1.

[0088] It can be understood that there will be air inside the water pump 31 itself before it works. To ensure the smoothness of the pumping operation, in this embodiment, the outlet end 31b of the water pump 31 is connected to the inlet end 32a of the control valve 32, and the outlet end 32b of the control valve 32 is extended into the water collection box 1 to form an exhaust circuit. Thus, when the water pump 31 is turned on, the control valve 32 is used to control the communication between the outlet end 31b of the water pump 31 and the inner cavity of the water collection box 1 to first empty the air inside the water pump 31 itself; then, the control valve 32 is used to control the communication between the outlet end 31b of the water pump 31 and the water circuit system, so that the water pump 31 performs the pumping operation.

[0089] In this embodiment, by arranging both the water pump 31 and the control valve 32 on the top of the water collection box 1, the lateral occupied area of the condensate recovery device 100 is reduced, the space is effectively utilized, and the occupied space in the gas water heater is further reduced.

[0090] Optionally, the water pump 31 can be a diaphragm pump. Optionally, the control valve 32 can be a solenoid valve.

[0091] In an embodiment of the present application, as Figure 4 、 Figure 5 and Figure 11 , a filter screen 34 is provided at the inlet end of the water suction pipe 17; a sewage discharge port 102 is provided at the bottom of the water collection box 1, and the sewage discharge port 102 and the inlet end of the water suction pipe 17 at least partially overlap in the projection on the bottom wall of the water collection box 1.

[0092] By providing the filter screen 34 at the inlet end of the water suction pipe 17, it is prevented that the particulate impurities in the water outlet cavity C enter the water pump 31, causing a failure of the water pump 31.

[0093] By providing the sewage discharge port 102 at the bottom of the water collection box 1, it is convenient for the staff to clean the impurities and dirt. Optionally, a sewage discharge cover 18 can be provided at the sewage discharge port 102 and opened when cleaning is required to prevent the sewage discharge port 102 from leaking during normal operation. Optionally, for easy disassembly and assembly, the sewage discharge cover 18 can be threadedly connected to the sewage discharge port 102.

[0094] In this embodiment, by making the sewage discharge port 102 and the inlet end of the water suction pipe 17 at least partially overlap in the projection on the bottom wall of the water collection box 1, the staff can clean the filter screen 34 on the water suction pipe 17 through the sewage discharge port 102, improving the operation convenience. Preferably, the sewage discharge port 102 and the inlet end of the water suction pipe 17 overlap in the projection on the bottom wall of the water collection box 1.

[0095] In an embodiment of the present application, as Figures 1 to 3 , the condensate recovery device 100 further includes a check valve 4, and the check valve 4 is provided on the connecting pipeline between the pumping structure 3 and the water circuit system.

[0096] In this embodiment, the one-way valve 4 is a valve structure that conducts unidirectionally from the pumping structure 3 towards the water circuit system, preventing water flow from flowing back from the water circuit system into the pumping structure 3.

[0097] In one embodiment of the present application, as Figures 3 to 6 , the condensate recovery device 100 further includes a pressure balance port 101 provided at the top of the water collection box 1, and the pressure balance port 101 communicates the outside with the inner cavity of the water collection box 1.

[0098] It can be understood that when the water inlet pipe 16 extends into the lower cavity part of the water inlet cavity A and condensate enters the water collection box 1 from the water inlet pipe 16, the pipe orifice of the water inlet pipe 16 will be gradually submerged. As the water inflow increases, the air pressure in the water collection box 1 may become too high, resulting in the inability of the condensate to enter smoothly. Based on this, in this embodiment, by providing the pressure balance port 101 at the top of the water collection box 1, the air pressure in the water collection box 1 is balanced with the outside air pressure, so that the condensate can flow smoothly into the water collection box 1.

[0099] In one embodiment of the present application, as Figure 2 、 Figure 5 and Figure 10 , the condensate recovery device 100 further includes a liquid level detection module 5 for detecting the water level in the water collection box 1, and the liquid level detection module 5 is electrically connected to the pumping structure 3.

[0100] In this embodiment, by providing the liquid level detection module 5 to detect the water level in the water collection box 1, when the water level reaches a sufficient height, the pumping structure 3 is automatically activated to pump water, preventing water overflow; when the water level is low, the pumping structure 3 is turned off to avoid dry pumping of the pumping structure 3 and causing failures.

[0101] Optionally, the liquid level detection module 5 can be a water level probe or a liquid level sensor.

[0102] In one embodiment of the present application, as Figures 4 to 6 , the water collection box 1 includes a box body 11 and an upper cover 12. The top of the box body 11 is open, and the upper cover 12 is covered on the top of the box body 11 to form a water storage cavity. The upper cover 12 is hermetically connected to the box body 11; the filtering module 2 is provided in the box body 11, and the pumping structure 3 is installed on the upper cover 12.

[0103] In this embodiment, by setting the water collection box 1 as a split structure of the box body 11 and the upper cover 12, it is convenient for disassembly and assembly, facilitates cleaning and maintenance of the interior of the box body 11, and is also convenient for replacing the filtering module 2. A sealing ring can be provided between the upper cover 12 and the box body 11 for sealing connection to prevent water leakage.

[0104] Optionally, the water inlet chamber A, the filtration chamber B, and the water outlet chamber C are all formed in the inner cavity of the box body 11. The filtration module 2 is disposed in the box body 11. The water inlet pipe 16, the water extraction pipe 17, the outlet end 32b of the control valve 32, and the pressure balance port 101 are all disposed on the upper cover 12, and the sewage outlet 102 is disposed at the bottom of the box body 11. In actual application, for the sake of simplifying the installation, the water inlet pipe 16 and the water extraction pipe 17 can be integrally formed on the upper cover 12. With such a setting, only the pipe connection operation needs to be carried out from the outside for installation, further improving the assembly efficiency.

[0105] Optionally, the upper cover 12 is further provided with a control valve outlet end mounting port 103 and a liquid level probe mounting port 104 to facilitate the mounting of the outlet end 32b of the control valve 32 and the liquid level probe.

[0106] The present utility model further provides a gas water heater, such as Figure 1 , the gas water heater includes an equipment main body and a condensate recovery device 100. The specific structure of the condensate recovery device 100 refers to the above-mentioned embodiments. Since this gas water heater adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated herein one by one.

[0107] Among them, the equipment main body includes a main heat exchanger 200 for performing primary heat exchange on the flue gas after combustion and a condensate heat exchanger 300 for performing secondary heat exchange on the flue gas after primary heat exchange; the condensate recovery device 100 is used to recover the condensate generated by the condensate heat exchanger 300, and inject the collected and neutralized and filtered condensate into the water circuit system. In this way, through the setting of the condensate recovery device 100, the condensate can be effectively injected into the water circuit system of the gas water heater, avoiding the direct discharge of the condensate, thereby avoiding the waste of water resources and also avoiding the inconvenience caused to the user due to the improper position of the direct discharge of the condensate.

[0108] Optionally, the device body generally includes a housing, a burner 500, a main heat exchanger 200, a condensing heat exchanger 200, and a blower 600. The water circuit system includes a cold water inlet pipe 410, a hot water outlet pipe 420, and an intermediate pipe connected between the cold water inlet pipe 410 and the hot water outlet pipe 420. The cold water inlet pipe 410 is connected to an external water source. After passing through the water circuit system, the external water source exchanges heat through the condensing heat exchanger 300 and the main heat exchanger 200, and then outputs the hot water required by the user from the hot water outlet pipe 420. The housing forms a connected combustion chamber and a flue gas heat exchange chamber, as well as a smoke exhaust port and a condensate outlet communicating with the flue gas heat exchange chamber. The burner 500 and the main heat exchanger 200 are arranged in the combustion chamber. The main heat exchanger 200 is arranged above the burner for easy heating. The condensing heat exchanger 300 can be arranged in the flue gas heat exchange chamber. The combustion chamber and the flue gas heat exchange chamber are connected. In this way, the flue gas generated by the burner exchanges heat with the main heat exchanger 200 in the combustion chamber for the first time, and then flows into the flue gas heat exchange chamber to exchange heat with the condensing heat exchanger 300 for the second time. In order to improve the heat exchange efficiency of the second heat exchange, the flow direction of the water circuit system is usually to exchange heat with the condensing heat exchanger 300 first and then with the main heat exchanger 200. The condensate generated by the condensing heat exchanger 300 can flow to the condensate recovery device 100 for neutralization filtration and then be injected into the water circuit system.

[0109] Optionally, the pumping structure 3 can inject the neutralized and filtered water into the cold water inlet pipe 410 or the hot water outlet pipe 420.

[0110] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A condensate recovery device, characterized in that: Applicable to a gas water heater, the gas water heater comprises an equipment body and a water system; The condensed water recovery device comprises: A water collecting box, used to receive condensed water generated by condensation heat exchange of the main body of the equipment; A filtering module is disposed inside the water collecting box and is used to neutralize and filter the condensed water in the water collecting box; and A pumping structure, disposed on the top of the water collecting box, for injecting the filtered condensed water in the water collecting box into the water system; A plurality of first partition plates are provided in the water collecting box, and the plurality of first partition plates divide the inner cavity of the water collecting box into a water inlet cavity, a filter cavity and a water outlet cavity, and the first partition plates are provided with a first water outlet connecting two adjacent cavities; The water inlet chamber is connected to the equipment body through a water inlet pipe; The filter module is built into the filter cavity; The water pumping structure is communicated with the water outlet cavity through a water pumping pipe.

2. The condensed water recovery device according to claim 1, characterized in that: The filter module is arranged at the bottom of the inner cavity of the water collecting box, and the filter module is at least partially immersed in the condensed water in the water collecting box.

3. The condensed water recovery device according to claim 2, characterized in that: The first water outlet connecting the water inlet cavity and the filter cavity is arranged on the top of the corresponding first partition plate; And / or, the first water outlet connecting the filter cavity and the water outlet cavity is arranged on the top of the corresponding first partition plate.

4. The condensed water recovery device according to claim 3, characterized in that: The water collecting box is further provided with a plurality of second partition plates, the plurality of second partition plates divide the filter chamber into at least two sub-filter chambers, and the bottom of the second partition plate is provided with a second water outlet connecting two adjacent sub-filter chambers; The second water outlets of two adjacent second partition plates are staggered.

5. The condensed water recovery device according to any one of claims 1 to 4, characterized in that: The top of the filter cavity is sealed with a cover plate, and there is a gap between the cover plate and the top inner wall of the water collecting box, and the gap is connected to both the water inlet cavity and the water outlet cavity; The cover plate is provided with a plurality of liquid inlet holes communicating with the gap and the filter cavity.

6. The condensed water recovery device according to any one of claims 1 to 4, characterized in that: The pumping structure comprises: A water pump is arranged on the top of the water collecting box, and the inlet end of the water pump is connected with the inner cavity of the water collecting box through a water pumping pipe; A control valve is disposed on the top of the water collecting box, wherein the outlet end of the control valve is connected to the inner cavity of the water collecting box; and A three-way pipe, one end of which is connected to the outlet end of the water pump, one end of which is connected to the inlet end of the control valve, and the other end of which is connected to the water system.

7. The condensed water recovery device according to claim 6, characterized in that: A filter screen is provided at the inlet end of the water pumping pipe; The bottom of the water collecting box is provided with a sewage outlet, and the sewage outlet and the projection of the inlet end of the water suction pipe on the bottom wall of the water collecting box at least partially overlap.

8. The condensed water recovery device according to any one of claims 1 to 4, characterized in that: The condensed water recovery device further comprises a one-way valve, which is arranged on a connecting pipe between the pumping structure and the water system; And / or, the condensed water recovery device further comprises a pressure balance port provided at the top of the water collecting box, the pressure balance port being connected to the outside and the inner cavity of the water collecting box; And / or, the condensed water recovery device further comprises a liquid level detection module for detecting the water level in the water collecting box, and the liquid level detection module is electrically connected to the pumping structure.

9. The condensed water recovery device according to any one of claims 1 to 4, characterized in that: The water collecting box comprises a box body and an upper cover, the top of the box body is open, the upper cover is arranged on the top of the box body to form a water storage cavity, and the upper cover is sealed and connected to the box body; The filter module is arranged in the box body, and the water pumping structure is installed on the upper cover.

10. A gas water heater having a water circuit system, characterized in that: include: The main body of the equipment includes a main heat exchanger for primary heat exchange of the flue gas after combustion and a condensing heat exchanger for secondary heat exchange of the flue gas after the primary heat exchange; as well as The condensed water recovery device as described in any one of claims 1 to 9 is used to recover the condensed water generated by the condensing heat exchanger, and inject the collected condensed water into the water system after filtering.

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