CN115342660A

CN115342660A - Heat exchanger and water heater

Info

Publication number: CN115342660A
Application number: CN202110529464.1A
Authority: CN
Inventors: 刘世贤; 张杰宁; 梁国荣
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-11-15

Abstract

The invention provides a heat exchanger and a water heater. Wherein, the heat exchanger includes: the air inlet and the air outlet are communicated with the air duct; the heat exchange pipeline is arranged on the shell, at least one part of the heat exchange pipeline is positioned in the air duct, and the heat exchange pipeline is configured to exchange heat with the air duct. At least one part of the heat exchange pipeline is positioned in the air duct, so that cold water in the heat exchange pipeline can exchange heat with high-temperature flue gas in the air duct, the cold water in the heat exchange pipeline is heated by the high-temperature flue gas, the effect of preheating the cold water is achieved, the heat efficiency of a water heater using the heat exchanger is favorably improved, and the heat loss is reduced. Meanwhile, the temperature of the high-temperature flue gas can be reduced after heat exchange, one part of the flue gas can be condensed into water drops, and the other part of the flue gas can be discharged out of the heat exchanger through the air outlet, namely, the amount of the flue gas discharged out of the heat exchanger through the air outlet is reduced, the emission amount of the flue gas to the outside environment is reduced, and the energy conservation and the environmental protection are facilitated.

Description

Heat exchanger and water heater

Technical Field

The invention relates to the technical field of water heaters, in particular to a heat exchanger and a water heater.

Background

In the related technology, the gas water heater can generate a lot of waste gas when working, the waste gas has bad smell and contains a large amount of harmful substances, therefore, a smoke exhaust pipe is additionally arranged when the gas water heater is installed, and the waste gas is exhausted by the smoke exhaust pipe. In the related art, the temperature of the flue gas exhausted through the smoke exhaust pipe is high, and the waste heat of the flue gas is not effectively utilized, so that the heat efficiency of the gas water heater is low.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the invention proposes a heat exchanger.

A second aspect of the present invention provides a water heater.

In view of the above, one aspect of the present invention provides a heat exchanger, including: the air inlet, the air outlet and the air duct are arranged on the shell, and the air duct is communicated with the air inlet and the air outlet; the heat exchange pipeline is arranged on the shell, at least one part of the heat exchange pipeline is positioned in the air duct, and the heat exchange pipeline is configured to exchange heat with the air duct.

The heat exchanger is used for a water heater, and high-temperature airflow (such as smoke) generated when the water heater works enters an air duct through the air inlet. Because at least one part of the heat exchange pipeline is positioned in the air duct, cold water in the heat exchange pipeline can exchange heat with high-temperature flue gas in the air duct, the cold water in the heat exchange pipeline is heated by the high-temperature flue gas, the effect of preheating the cold water is achieved, the heat efficiency of a water heater using the heat exchanger is favorably improved, and the heat loss is reduced. Meanwhile, the temperature of the high-temperature flue gas can be reduced after heat exchange, one part of the flue gas can be condensed into water drops, and the other part of the flue gas can be discharged out of the heat exchanger through the air outlet, namely, the amount of the flue gas discharged out of the heat exchanger through the air outlet is reduced, the emission amount of the flue gas to the outside environment is reduced, and the energy conservation and the environmental protection are facilitated.

Furthermore, due to the arrangement of the air inlet and the air outlet, at least one part of the heat exchange pipeline is positioned in the air duct, and high-temperature flue gas is distributed in the air duct, so that the high-temperature flue gas can be in comprehensive and direct contact with the heat exchange pipeline as far as possible, the heat exchange distance between cold water in the heat exchange pipeline and the high-temperature flue gas is shortened, the cold water at different positions of the heat exchange pipeline can effectively exchange heat with the high-temperature flue gas, the heat exchange efficiency is favorably improved, and the heat loss is reduced. Meanwhile, the heat efficiency of the heat exchanger is guaranteed, meanwhile, the occupancy rate of the inner space of the heat exchanger is reduced, the size of the heat exchanger is reduced, and the light and thin heat exchanger can be achieved.

According to the heat exchanger, the following additional technical characteristics can be provided:

in the above technical solution, further, a first opening and a second opening are provided at a side of the housing away from the air outlet, and both the first opening and the second opening are communicated with the air duct; the heat exchange pipeline comprises a first joint, a first connecting pipe, a second connecting pipe and a second joint; one part of the first joint extends out of the shell through the first opening, one part of the second joint extends out of the shell through the second opening, and the first connecting pipe and the second connecting pipe are both positioned in the air duct; the first end of the first connecting pipe is connected with the first connector, the first connecting pipe extends spirally to form a spiral pipe body, and the second end of the first connecting pipe is positioned at the air outlet; the second connecting pipe extends from the second end of the first connecting pipe to the second joint, and the first connecting pipe and the second joint are connected through the second connecting pipe; wherein, the spiral pipe body is arranged around the outer side of the second connecting pipe.

In the technical scheme, the heat exchange pipeline comprises a first joint, a first connecting pipe, a second connecting pipe and a second joint. Through the cooperation structure of reasonable heat transfer pipeline and air outlet that sets up for the heat transfer pipeline that the heat transfer pipeline set up for upper and lower spiral winding, first interface and second interface all are located the one side that the air outlet was kept away from to the heat exchanger. Specifically, after a first connector of the heat exchange pipeline enters the shell from the lower part of the heat exchanger, the first connecting pipe is spirally wound to the top of the heat exchanger, and then extends to the second connector from a second connecting pipe in the middle of the spiral pipe body. The arrangement can enable the heat exchange pipeline to be close to the shell as far as possible, and the whole volume of the heat exchanger is reduced.

Furthermore, the spiral pipe body is enclosed on the outer side of the second connecting pipe, and the spiral pipe body is arranged under the condition that the heat exchange pipeline is fixed, so that the volume of the heat exchange pipeline is reduced, the occupancy rate of the heat exchange pipeline to the inner space of the heat exchanger is reduced, and the whole volume of the heat exchanger is favorably reduced.

Further, through the structure of reasonable setting heat transfer pipeline for first connecting pipe is the heliciform and extends, in order to form the heliciform body. This structure setting has increaseed the length of heat transfer pipeline in the wind channel greatly to be favorable to increasing the heat transfer area of the high temperature flue gas in heat transfer pipeline and the wind channel, the in-process of progressively filling cold water in the heat transfer pipeline can guarantee validity, stability and the feasibility of adjusting the cold water temperature in the heat transfer pipeline, is favorable to promoting the thermal efficiency of the water heater of using the heat exchanger, reduces the heat loss.

In any of the above technical solutions, further, a part of the housing is recessed toward a direction away from the inside of the housing to form a recessed portion, the air inlet is disposed in the recessed portion, and the flow guiding device is located at an opening end of the recessed portion.

In this technical scheme, some orientation of casing deviates from the inside direction of casing and caves in order to form the depressed part, and make the air intake locate the depressed part, the depressed part has the effect of buffering and water conservancy diversion, so that it is by the position department of water conservancy diversion to keeping away from to the air outlet to make the partly air current that enters into in the wind channel by the air intake, in order to prolong the flow path of high temperature flue gas in the wind channel, and then guarantee the effective area of contact of high temperature flue gas and heat transfer pipeline, and then guaranteed the heat transfer area of cold water in the heat transfer pipeline and high temperature flue gas, be favorable to promoting heat exchange efficiency.

In any of the above technical solutions, further, the heat exchanger further includes: the convex structure is arranged in the shell, the air inlet is positioned between the convex structure and the air outlet, and a gap is formed between the convex structure and the heat exchange pipeline.

In this technical scheme, through setting up protruding structure, make protruding structure be located the casing, and the air intake is located between protruding structure and the air outlet, protruding structure has the effect of direction, make the position department that the air outlet was kept away from to the part air current between protruding structure and the heat transfer pipeline through the clearance flow direction between protruding structure and the heat transfer pipeline in the wind channel, with the flow path of extension high temperature flue gas in the wind channel, and then guarantee the effective area of contact of high temperature flue gas and heat transfer pipeline, and then guaranteed the heat transfer area of cold water and high temperature flue gas in the heat transfer pipeline, be favorable to promoting heat exchange efficiency.

In any of the above solutions, further, at least a portion of the protruding structure is located at a sidewall of the recess.

In this technical scheme, through the cooperation structure of reasonable setting protruding structure and depressed part for at least a part of protruding structure is located the lateral wall department of depressed part, and this setting can avoid the lateral wall of depressed part and the junction fracture of diapire when guaranteeing the validity and the feasibility of protruding structure water conservancy diversion, and can avoid the opening end department fracture of depressed part.

In any of the above technical solutions, further, the air inlet is located at the first side of the housing, the air outlet is located at the second side of the housing, and at least a part of the heat exchange pipeline in the air duct is located between the air inlet and the air outlet; wherein the first side and the second side are adjacent sides of the housing.

In the technical scheme, the air inlet is positioned on the first side of the shell, the air outlet is positioned on the second side of the shell, at least one part of the heat exchange pipeline in the air duct is positioned between the air inlet and the air outlet, and the first side and the second side are limited to be two adjacent sides of the shell by reasonably arranging the matching structures of the air inlet, the air outlet and the heat exchange pipeline. This setting has increased by the flow path of the high temperature flue gas of air intake flow direction air outlet, has guaranteed the effective area of contact of high temperature flue gas and heat transfer pipeline, and then has guaranteed the heat transfer area of cold water in the heat transfer pipeline and high temperature flue gas, is favorable to promoting heat exchange efficiency.

Specifically, the heat exchange pipeline is the stainless steel corrugated pipe that spiral winding set up from top to bottom, and first interface and second interface all set up in the bottom of heat exchanger, and after the first interface of heat exchange pipeline got into the casing from the lower part of heat exchanger, first connecting pipe spiral winding to the top of heat exchanger, and the middle part from spiral coil forms the second connecting pipe afterwards, and it is external to stretch out the casing through the second joint. And the air inlet and the air outlet are positioned at two adjacent sides of the shell, and the arrangement is favorable for reducing the flow speed of the flue gas in the air duct so as to ensure that the high-temperature flue gas and cold water in the heat exchange pipeline effectively exchange heat.

In any of the above technical solutions, further, the heat exchanger further includes: the flow guide device is positioned in the shell and positioned at the air inlet, and the flow guide device is configured to guide the air flow entering the air channel from the air inlet to a position far away from the air outlet.

In the technical scheme, the flow guide device is arranged at the air inlet, and the air flow entering the air channel from the air inlet is guided to the position far away from the air outlet by the flow guide device. Namely, the guiding device has the function of changing the flow path of the air flow flowing into the air channel from the air inlet, so that the high-temperature flue gas flowing in from the air inlet is guided to the position far away from the air outlet, the flow path of the high-temperature flue gas in the air channel is prolonged, the effective contact area of the high-temperature flue gas and the heat exchange pipeline is guaranteed, the heat exchange area of the cold water and the high-temperature flue gas in the heat exchange pipeline is guaranteed, and the heat exchange efficiency is favorably improved.

If the flue gas that gets into in the wind channel by the air intake directly flows to the air outlet, then will shorten the flow path of high temperature flue gas, like this, the high temperature flue gas can't effectively contact with the cold water in the heat transfer pipeline, will lead to heat exchange efficiency to be reduced.

In any of the above technical solutions, further, the flow guiding device is a flow guiding plate, and the flow guiding plate is configured to be capable of plugging a portion of the air inlet.

In the technical scheme, the matching structure of the flow guide device and the air inlet is reasonably arranged, so that the flow guide device is a flow guide plate, and the flow guide plate can block one part of the air inlet, and thus, air flow flows into the air channel through the air inlet which is not blocked. That is to say, the air flow flowing into the air duct through the air inlet which is not blocked is guided by the guide plate which blocks the air inlet, so that the high-temperature flue gas is guided to the position far away from the air outlet, and the flow path of the high-temperature flue gas in the air duct is prolonged.

In any of the above technical solutions, further, a side wall of the casing is a first side of the casing, a top wall of the casing is a second side of the casing, and the flow guide device is configured to guide the airflow entering the air duct from the air inlet to the bottom wall of the casing.

In this technical scheme, through the setting position of reasonable air intake and air outlet of setting up for the air intake is located the lateral wall of casing, and the air outlet is located the roof of casing, and guiding device is configured to can be with the air current water conservancy diversion that gets into the wind channel by the air intake to the diapire of casing. Namely, the high-temperature flue gas flowing to the air duct through the air inlet is guided to the bottom wall of the shell and then flows to the top wall of the shell. This setting makes the high temperature flue gas can follow heat transfer pipeline's bottom flow direction heat transfer pipeline's top for cold water in the heat transfer pipeline can effectively contact with the high temperature flue gas, and then has guaranteed the heat transfer area of cold water in the heat transfer pipeline and high temperature flue gas, is favorable to promoting heat exchange efficiency. In any of the above technical solutions, further, the housing is further provided with a water outlet, and the water outlet is communicated with the air duct.

In the technical scheme, the shell is also provided with a water outlet, and the water outlet is communicated with the air channel. The temperature can reduce after the high temperature flue gas in the wind channel exchanges heat with the heat transfer pipeline, and the temperature can reduce after the high temperature flue gas heat transfer, and partly flue gas can condense into the drop of water, promptly, has reduced the flue gas volume by air outlet discharge heat exchanger, reduces the flue gas emission in to the external environment, is favorable to realizing energy-concerving and environment-protective. In addition, the condensed water formed after condensation can slide down from the outer wall surface of the heat exchange pipeline and then is discharged out of the heat exchanger through the water outlet. The inside aridity of heat exchanger can be guaranteed in this setting, avoids because produce a large amount of comdenstion water in the heat exchanger, makes the water heater breed the bacterium under the long-term wet cold situation, brings the health problem for the user.

In any of the above technical solutions, further, the heat exchanger further includes: and the liquid level detection device is arranged on the shell and is positioned above the water outlet.

In this technical scheme, through setting up liquid level detection device for liquid level detection device locates the casing, utilizes liquid level detection device to detect the comdenstion water liquid level in the wind channel, with the ponding condition of understanding the heat exchanger inside, provides data support for follow-up water heater control heat exchanger work. In addition, whether the drain hole is clogged or not can be determined by a detection signal of the liquid level detection device. If the water outlet is blocked, the level of the condensed water in the air duct is gradually increased; if the water outlet is not blocked, the liquid level of the condensed water in the air duct is more stable.

In any of the above technical solutions, further, the liquid level detection apparatus further includes: a plurality of detection portions arranged at intervals.

In this technical scheme, liquid level detection device still includes a plurality of detection portions, and usable a plurality of detection portions detect the liquid level in the wind channel. Because a plurality of detection portions are arranged at intervals, the condensed water liquid level in the air channel can be detected at a plurality of positions, and the detection precision can be ensured. In addition, can control some work in a plurality of detection portions according to concrete actual conditions, or control the work of a plurality of detection portions entirely to satisfy different user demands, promote the performance of product. In addition, when one or more of the detection parts are damaged, the liquid level can be detected by the rest detection parts, so that the normal use of the heat exchanger can be ensured, and the normal use of the water heater can not be delayed.

In any of the above technical solutions, further, distances from the plurality of detection portions to the bottom wall of the housing are all equal.

In this technical scheme, the distance of a plurality of detection portions to the diapire of casing is all equal, promptly, can utilize a plurality of detection portions to detect same liquid level. Therefore, when one or more of the detection parts are damaged, the liquid level can be detected by the rest detection parts, the normal use of the heat exchanger can be ensured, and the normal use of the water heater cannot be delayed.

In any one of the above technical solutions, further, the plurality of detection portions are arranged at intervals along a direction from the bottom wall to the top wall of the housing.

In this technical scheme, through the distribution position that sets up a plurality of detection portions for along the direction of the diapire to the roof of casing, a plurality of detection portion interval arrangements, like this, the lower detection portion in position detects low liquid level, and the higher detection portion in position detects high liquid level. That is, different liquid levels are detected by the plurality of detection portions. For example, the low liquid level is the liquid level when the heat exchanger normally works, and the high liquid level is the warning liquid level when the water outlet is blocked. This arrangement provides effective data support for subsequent adjustment of the operating conditions of the heat exchanger.

In any of the above technical solutions, further, the heat exchanger further includes: the fixing device is provided with a plurality of elastic buckling positions, and any layer of the spiral pipe body is clamped in one elastic buckling position.

In this technical scheme, through still setting up fixing device for fixing device sets up a plurality of elasticity and detains the position, utilizes elasticity to detain any one layer body in the position fixed heliciform body, in order to reach the purpose that utilizes a plurality of elasticity to detain the interval between the position assurance each layer body, is favorable to promoting the holistic structural strength of heat transfer pipeline.

It can be understood that the inner diameter of the elastic buckling position is smaller than the outer diameter of the pipe body, so that the stability of the elastic buckling position and the pipe body in clamping connection is ensured, and the situation that the fixing device falls off from the spiral pipe body is avoided.

In any of the above technical solutions, further, a partition portion is connected between any two adjacent elastic buckling positions, and the partition portion is inserted between two adjacent layers of pipe bodies in the spiral pipe body.

In this technical scheme, through setting up the partition portion for be connected with the partition portion between arbitrary two adjacent elasticity knot positions, like this, when fixing device heliciform body assembly, the partition portion is inserted and is located between the adjacent two-layer body in the heliciform body, and the partition portion has the effect of separating adjacent two-layer body, with the interval of guaranteeing between the adjacent two-layer body. When external force acts on the spiral pipe body, the partition part has the function of relieving the external force so as to reduce the probability of breakage of the spiral pipe body and be beneficial to prolonging the service life of the spiral pipe body.

Specifically, the separating part is integrally connected with the elastic buckling position. For example, the fixing device is made by bending a stainless steel plate.

In any of the above technical solutions, further, the number of the fixing devices is plural, and the plural fixing devices are distributed at intervals outside the spiral pipe body.

In this technical scheme, through the cooperation structure of rationally setting up a plurality of fixing device and heliciform body for a plurality of fixing device interval distribution have increased the area of contact of fixing device with the heliciform body in the outside of heliciform body, have richened the contact angle of fixing device with the heliciform body, are favorable to promoting intensity, steadiness and the reliability of assembly.

In any of the above technical solutions, further, the heat exchanger further includes: and the one-way flow guide piece is positioned at the air outlet and is suitable for one-way conduction along the direction from the inside of the shell to the outside of the shell.

In this technical scheme, through setting up one-way water conservancy diversion spare for one-way water conservancy diversion spare is located air outlet department, and like this, the flue gas in the wind channel can be through one-way water conservancy diversion spare discharge heat exchanger, but the outside air current of heat exchanger can't enter into in the wind channel through one-way water conservancy diversion spare. This setting can prevent that in the cold air from getting into the wind channel through the air outlet backward flow by the heat exchanger outside, and the condition that leads to the heat transfer pipeline frost crack takes place, plays the effect of protection to the heat transfer pipeline, is favorable to prolonging the life of heat exchanger.

In any of the above technical solutions, further, the one-way flow guide member includes: the supporting plate is connected with the opening wall of the air outlet and is provided with a diversion opening and a stopping part, and the stopping part is positioned on the periphery of the diversion opening; the blades are rotatably connected with the supporting plate and rotate to conduct or block the flow guide port; when the blade blocks the flow guide opening, the edge of the blade is abutted against the stopping part.

In this technical scheme, one-way water conservancy diversion spare includes backup pad and blade. Through the cooperation structure of reasonable setting backup pad and blade for the backup pad is connected with the oral cavity wall of air outlet, and the backup pad has the effect of supporting the blade. Because the backup pad is provided with water conservancy diversion mouth and backstop portion, and backstop portion is located the week side of water conservancy diversion mouth, backstop portion has the effect of restriction blade turned angle for the blade can only outwards overturn and switch on the water conservancy diversion mouth with the direction to the casing outside along the casing is inside, and can't inwards overturn and switch on the water conservancy diversion mouth with the direction to the casing inside along the casing outside. Namely, the stopping part, the flow guide port and the blades are matched to achieve the purpose that the one-way flow guide piece is communicated in one way along the direction from the inside of the shell to the outside of the shell.

In any of the above technical solutions, further, the one-way flow guide further includes: the rotating shaft is arranged on the supporting plate; the blade comprises a first sub-blade and a second sub-blade, the first sub-blade and the second sub-blade are rotatably connected with the supporting plate through rotating shafts, and the first sub-blade and the second sub-blade are arranged in a mirror image mode by taking the rotating shafts as centers.

In the technical scheme, the one-way flow guide piece further comprises a rotating shaft, and the blades comprise a first sub-piece and a second sub-piece. Through the cooperation structure of rationally setting up pivot, first sub-piece and second sub-piece for first sub-piece and second sub-piece all rotate with the backup pad through the pivot and are connected, and first sub-piece and second sub-piece use the pivot to arrange as central mirror image, and first sub-piece rotates with the second sub-piece and switches on or shutoff water conservancy diversion mouth.

It will be appreciated that the first sub-piece and the second sub-piece are both rotatable about a rotation axis, which defines the position of the first sub-piece and the second sub-piece relative to the flow guide opening, and provides effective structural support for the first sub-piece and the second sub-piece to open or close the flow guide opening.

In any of the above solutions, further, the heat exchanger further includes a sealing member configured to seal a joint between the first joint and the first opening, and to seal a joint between the second joint and the second opening.

In the technical scheme, the heat exchanger further comprises a sealing element, the sealing element is used for sealing the joint of the first joint and the first opening and the joint of the second joint and the second opening, so that the high-temperature smoke in the air duct is prevented from leaking from the joint of the heat exchange pipeline and the first opening and the second opening, and the air tightness of the joint of the heat exchange pipeline and the first opening and the second opening can be ensured.

In any of the above technical solutions, further, the heat exchanger further includes: and the part of the first joint in the shell and the part of the second joint in the shell are connected through the fixing piece.

In this technical scheme, through setting up the mounting for the part that first joint is located the casing is connected through the mounting with the part that the second joint is located the casing, and the mounting plays the effect of fixed first joint and second joint, in order to guarantee the interval between first joint and the second joint, is favorable to promoting heat transfer pipeline's overall structure intensity. Like this, the assembly of the heat transfer pipeline of being convenient for and casing can prevent to utilize when fastener assembly heat transfer pipeline and casing, and first joint and second connect the rotation and lead to the installation to kick-back, have simplified the assembly process, are favorable to promoting assembly efficiency.

In any of the above technical solutions, further, the heat exchanger further includes: and the temperature controller is arranged on the shell and used for detecting the temperature of the air duct.

In this technical scheme, through setting up the temperature controller for the temperature controller is located the casing, utilizes the temperature controller to detect the temperature in wind channel, makes the flue gas temperature in the wind channel controllable, avoids leading to the heat exchanger thermal deformation or even the condition of burning out to take place because of wind channel high temperature, is favorable to promoting security and the reliability that the heat exchanger used.

In any of the above technical solutions, further, the housing includes: the upper cover plate is provided with an air outlet; a lower cover plate; the mesochite is positioned between the upper cover plate and the lower cover plate, the mesochite is provided with an air inlet, and the upper cover plate, the mesochite and the lower cover plate surround the air outlet channel.

In the technical scheme, the shell comprises an upper cover plate, a lower cover plate and a middle shell, the middle shell is positioned between the upper cover plate and the lower cover plate, one end of the middle shell is connected with the upper cover plate, the other end of the middle shell is connected with the lower cover plate, and the air outlet channel is surrounded by the upper cover plate, the middle shell and the lower cover plate. The middle shell is provided with an air inlet, the upper cover plate is provided with an air outlet, namely, high-temperature flue gas enters the air channel from the side part of the shell to exchange heat with the heat exchange pipeline, and then flows out of the heat exchanger from the top part of the shell.

In any of the above technical solutions, further, the housing includes: the main body part is of a groove structure, and an air inlet is formed in the side wall of the groove structure; the reinforcing ribs are arranged on the main body part, one part of the reinforcing ribs is connected with the side wall of the groove structure, and the other part of the reinforcing ribs is connected with the bottom wall of the groove structure; the upper cover plate is covered on the opening end of the groove structure, the upper cover plate is provided with an air outlet, and the main body part and the upper cover plate surround an air outlet channel.

In this technical scheme, the casing includes main part, strengthening rib and upper cover plate. The main body part is of a groove structure, the upper cover plate covers the opening end of the groove structure, and the main body part and the upper cover plate surround the air outlet channel. The side wall of the groove structure is provided with an air inlet, and the upper cover plate is provided with an air outlet, namely, high-temperature flue gas enters the air channel from the side part of the shell to exchange heat with the heat exchange pipeline and then flows out of the heat exchanger from the top of the shell.

Further, a part of the reinforcing rib is connected with the side wall of the groove structure, the other part of the reinforcing rib is connected with the bottom wall of the groove structure, and the reinforcing rib has the effect of reinforcing the main body part and is favorable for improving the structural strength of the main body part.

A second aspect of the present invention provides a water heater comprising: a heat exchanger as in any one of the preceding claims.

The water heater provided by the invention comprises the heat exchanger according to any one of the technical schemes in the first aspect, so that the water heater has all the beneficial effects of the heat exchanger, and the description is omitted here.

In the above technical solution, further, the water heater further includes: the control device is connected with the liquid level detection device of the heat exchanger; and the alarm device is connected with the control device, and the control device is configured to be capable of controlling the alarm device to work according to the detection signal of the liquid level detection device.

In the technical scheme, the water heater further comprises a cover body, a control device and an alarm device. The liquid level detection devices of the alarm device and the heat exchanger are connected with the control device, and the control device is used for controlling the alarm device to work according to detection signals of the liquid level detection devices. If the liquid level detection device detects that the liquid level in the air duct is high, the control device controls the alarm device to work according to a detection signal of the liquid level detection device so as to give out a prompt for reminding a user of paying attention to the fact that the water heater is in an abnormal operation state and needs to be overhauled. The safety and the reliability of the water heater can be guaranteed by the arrangement.

In any of the above technical solutions, further, the water heater further includes a display device, the display device is connected with the control device, and the control device is configured to be capable of controlling the display device to operate according to a detection signal of the liquid level detection device.

In this technical scheme, through setting up display device to make display device be connected with controlling means, when liquid level detection device detected that the liquid level is higher in the wind channel, controlling means will be according to liquid level detection device's detected signal, and control display device work is in abnormal operating condition in order to show that the water heater is present, reminds the user to pay attention to, needs to overhaul the water heater. The safety and the reliability of the water heater can be guaranteed by the arrangement.

In any one of the above technical solutions, further, the water heater further includes: the water inlet pipe is communicated with the heat exchanger; the main heat exchanger comprises a smoke outlet, a heat exchange inlet and a heat exchange outlet, wherein the heat exchange inlet is communicated with the heat exchanger, and the smoke outlet is communicated with the air inlet; and the water outlet pipe is communicated with the heat exchange outlet.

In the technical scheme, the water heater further comprises a water inlet pipe, a main heat exchanger and a water outlet pipe. Through the reasonable cooperation structure that sets up inlet tube, main heat exchanger, outlet pipe and heat exchanger for the inlet tube is linked together with the heat exchanger, and the heat transfer import of main heat exchanger is linked together with the heat exchanger, and the exhaust port of main heat exchanger is linked together with the air intake of heat exchanger, and the outlet pipe is linked together with the heat transfer export of main heat exchanger. Therefore, when the water heater works, cold water enters the heat exchanger through the water inlet pipe for heat exchange, then exchanges heat through the main heat exchanger, and then flows out of the water outlet pipe.

Specifically, when the water heater works, high-temperature airflow (such as flue gas) generated by the working of the main heat exchanger enters the air duct through the air inlet of the heat exchanger, cold water flows into the heat exchange pipeline, the cold water in the heat exchange pipeline can exchange heat with the high-temperature flue gas in the air duct, the cold water in the heat exchange pipeline is heated by using the high-temperature flue gas to preheat the cold water, and then the water after heat exchange of the heat exchanger flows to the main heat exchanger for heat exchange. Meanwhile, the temperature of the high-temperature flue gas can be reduced after heat exchange, one part of the flue gas can be condensed into water drops, and the other part of the flue gas can be discharged out of the heat exchanger through the air outlet, namely, the amount of the flue gas discharged out of the heat exchanger through the air outlet is reduced, the emission amount of the flue gas to the outside environment is reduced, and the energy conservation and the environmental protection are facilitated.

That is to say, through the cooperation structure of reasonable heat exchanger and main heat exchanger that sets up, when promoting the heating efficiency of water heater, reduced the outer flue gas volume of arranging of water heater, be favorable to realizing energy-concerving and environment-protective.

In any one of the above technical solutions, further, the water heater further includes: and the water pump is communicated with the inlet of the water inlet pipe and the outlet of the water outlet pipe, and the water pump is communicated in a one-way mode along the direction from the outlet of the water outlet pipe to the inlet of the water inlet pipe.

In the technical scheme, through setting up the water pump, make the import of water pump and inlet tube and the export of outlet pipe be linked together, and make the water pump along the export of outlet pipe to the import direction one-way conduction of inlet tube, like this, form circulation circuit between the export of outlet pipe and the import of inlet tube, make the water heater have the function of preheating, start the water pump, the water pump can be with the cold water in the outlet pipe take out to the inlet tube, and then discharge the water heater after the heat transfer by heat exchanger and main heat exchanger, make the user open the water heater at any water consumption point, the water that comes out all is hot water, just play hot water problem after having solved the water heater in the correlation technique and needing to put a section cold water, also the water heater has zero cold water and opens the instant heating function promptly. That is to say, after the user opened the function of opening promptly heating promptly of water heater, can use hot water bathing in the short time, need not to wait for a certain time in order to wash the bath again after discharging the cold water in the water heater, this setting has promoted the performance of product, can satisfy diversified user demand.

In any one of the above technical solutions, further, the water heater further includes: the smoke hood is communicated with the smoke exhaust port; the fan assembly is communicated with the smoke hood and the air inlet; the combustor is connected with the main heat exchanger, and the main heat exchanger is located between the combustor and the smoke cover.

In this technical scheme, the water heater still includes petticoat pipe, fan subassembly and combustor. Wherein, the petticoat pipe is connected with the exhaust port and the fan subassembly of main heat exchanger, and the petticoat pipe has the effect of water conservancy diversion and assemble for the flue gas of main heat exchanger exhaust flows to the fan subassembly along the runner that the inner wall of petticoat pipe formed. The flue gas velocity of the exhaust port of the main heat exchanger is high, the flue gas flows through the smoke hood, the deflection of the air flow can be reduced, the flow loss of the air flow is reduced, more energy is converted into dynamic pressure, the air quantity is improved, the phenomenon that the flow loss of the air flow is high due to the fact that the velocity is too high is avoided, the pneumatic performance is poor, the air outlet air quantity is reduced, meanwhile, the smoke hood also has the flow collecting effect, the frequency of the phenomena of air flow separation, vortex and the like is reduced, and the running noise of products is reduced.

Further, the petticoat pipe is located between the exhaust port of fan subassembly and main heat exchanger, and this setting can avoid main heat exchanger exhaust high temperature flue gas direct action to fan subassembly, and leads to the fan subassembly to be scalded the condition of damaging and take place, can protect fan subassembly when guaranteeing fan subassembly normal operating, is favorable to prolonging fan subassembly's life.

Further, the burner is connected with a main heat exchanger, the main heat exchanger is positioned between the burner and the smoke hood, the burner works to generate heat, and the main heat exchanger absorbs the heat generated by the combustion of the burner and exchanges the absorbed heat with water flowing through the main heat exchanger to heat the water.

In any one of the above technical solutions, further, the water heater further includes: the water discharge pipe is connected with the water discharge port of the heat exchanger; and the water seal device is connected with the drain pipe and comprises an alkaline part.

In the technical scheme, the water heater also comprises a drain pipe and a water seal device. The drain pipe is connected with the water outlet of the heat exchanger, and the heat exchanger works to discharge the generated condensed water through the drain pipe. Because the water seal device is connected with the drain pipe, condensed water flows through the water seal device, the condensed water is weakly acidic, and an alkaline part in the water seal device neutralizes the condensed water through the water seal device, so that the acidity and alkalinity of the condensed water are improved, and the influence of the discharged condensed water on the environment is reduced.

In any one of the above technical solutions, further, the water seal device further includes: the outer barrel is connected with the drain pipe and comprises a first pipe body and a second pipe body, the second pipe body is located on the periphery of the first pipe body, one end of the first pipe body is communicated with the drain pipe, and the other end of the first pipe body is communicated with the second pipe body; at least one part of the inner barrel extends into the second barrel, a first flow channel is enclosed between the outer wall of the first barrel and the inner wall of the inner barrel, a second flow channel is enclosed between the outer wall of the inner barrel and the inner wall of the second barrel, and the first flow channel is communicated with the first barrel and the second flow channel.

In the technical scheme, the water seal device further comprises an inner barrel and an outer barrel, wherein the outer barrel comprises a first pipe body and a second pipe body. Through the reasonable arrangement of the matching structure of the inner barrel and the outer barrel, a first flow channel is enclosed between the outer wall of the first pipe body and the inner wall of the inner barrel, a second flow channel is enclosed between the outer wall of the inner barrel and the inner wall of the second pipe body, and the first flow channel is communicated with the first pipe body and the second flow channel. That is, the condensed water flows through the first pipe, the first flow channel and the second flow channel in sequence and is discharged from the inner barrel. This set up the flow path who has injectd the comdenstion water, in the comdenstion water flowed into the water seal ware, the comdenstion water reaches a quantitative back, just can cross the tip flow direction second runner that stretches into outer bucket inside interior bucket, promptly when guaranteeing comdenstion water exhaust validity, can play and block the inside flue gas of heat exchanger and pass through drain pipe exhaust effect, promptly avoid the flue gas to reveal by the drain pipe, with security and the reliability of guaranteeing the water heater use, the performance and the market competition of product have been promoted.

Specifically, interior bucket and outer bucket detachable connections should set up clearance, the cleanness of the water seal ware of being convenient for, can guarantee the sanitary nature in use of water seal ware, avoids breeding the bacterium, can realize the reuse of water seal ware.

In any of the above technical solutions, further, the inner barrel is provided with a flow guiding hole and a stopping portion, the flow guiding hole is communicated with the second flow channel, the flow guiding hole is located between the stopping portion and the other end of the first tube body, and the stopping portion abuts against the inner wall of the second tube body; the water seal further comprises a sealing element, and the sealing element is used for sealing the joint of the stopping part and the second pipe body.

In the technical scheme, the inner barrel is provided with the flow guide holes, and the flow guide holes are communicated with the second flow channel, so that condensed water in the second flow channel can flow into the inner barrel through the flow guide holes and then is discharged out of the water seal device.

Further, interior bucket still includes backstop portion, and the water conservancy diversion hole is located between the other end of backstop portion and first body to utilize the sealing member to seal the clearance between the inner wall of backstop portion and second body, this setting has injectd the flow path of comdenstion water, avoids the comdenstion water to provide effectual structural support by the direct outer discharge water seal ware of second runner, for avoiding the flue gas to leak.

Specifically, the sealing element is a sealing ring.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates a first perspective structural schematic of a heat exchanger according to an embodiment of the present invention;

FIG. 2 shows an exploded view of a heat exchanger of one embodiment of the present invention;

FIG. 3 illustrates a second perspective, schematic structural view of a heat exchanger according to an embodiment of the present invention;

FIG. 4 shows a schematic structural view of a water heater of a first embodiment of the present invention;

FIG. 5 shows a schematic structural view of a water heater of a second embodiment of the present invention;

fig. 6 shows a schematic structural view of a water seal according to an embodiment of the present invention;

FIG. 7 shows a schematic structural diagram of a heat exchanger according to another embodiment of the present invention;

FIG. 8 shows an exploded view of a heat exchanger according to another embodiment of the present invention;

fig. 9 shows a structural schematic diagram of a one-way flow guide of one embodiment of the invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 9 is:

100 heat exchanger, 110 shell, 112 air inlet, 114 air outlet, 116 air duct, 118 upper cover plate, 120 lower cover plate, 122 middle shell, 124 depressed part, 126 water outlet, 128 first opening, 130 second opening, 132 main body part, 140 heat exchange pipeline, 150 flow guide device, 160 liquid level detection device, 162 detection part, 170 sealing element, 180 nut, 182 convex structure, 183 fixing device, 184 elastic buckling position, 185 partition part, 186 one-way flow guide piece, 187 support plate, 188 rotating shaft, 189 first sub-piece, 190 second sub-piece, 191 first joint, 192 second joint, 193 fixing piece, 194 temperature controller, 195 first connecting pipe, 196 second connecting pipe, 200 water heater, 210 water inlet pipe, 220 main heat exchanger, 230 water outlet pipe, 240 water pump, 250 smoke cover, 260 fan assembly, 270 burner, 280 water outlet pipe, 290 water sealer, outer tub 292, 294 first pipe body, 296 second pipe body, 298 inner tub, 300 first flow passage, 302 second flow passage, 304 flow guide hole, stop part 306, sealing element, 320, 308 proportional valve, 308, exhaust gas outlet device, 350, 340 exhaust gas outlet pipe.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention, taken in conjunction with the accompanying drawings and detailed description, is set forth below. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Heat exchanger 100 and water heater 200 according to some embodiments of the present invention are described below with reference to fig. 1-9.

The basic principle of this scheme is, provides a take water heater of heat exchanger, includes: the heat exchanger comprises a heat exchanger 100, a water inlet pipe 210, a main heat exchanger 220 and a water outlet pipe 230, wherein the water inlet pipe 210 is communicated with the heat exchanger 100, the main heat exchanger 220 comprises a smoke exhaust port, a main heat pipe inlet and a main heat exchange outlet, the main heat exchange inlet is communicated with the heat exchanger 100, and the smoke exhaust port is communicated with an air inlet 112 of the heat exchanger; and a water outlet pipe 230, wherein the water outlet pipe 230 is communicated with the main heat exchange outlet.

Through reasonable arrangement of the matching structures of the water inlet pipe 210, the main heat exchanger 220, the water outlet pipe 230 and the heat exchanger 100, the water inlet pipe 210 is communicated with the heat exchanger 100, a main heat exchange inlet of the main heat exchanger 220 is communicated with the heat exchanger 100, a smoke outlet of the main heat exchanger 220 is communicated with the air inlet 112 of the heat exchanger 100, and the water outlet pipe 230 is communicated with a main heat exchange outlet of the main heat exchanger 220. Thus, when the water heater 200 works, cold water enters the heat exchanger 100 through the water inlet pipe 210 for heat exchange, then exchanges heat through the main heat exchanger 220, and then flows out through the water outlet pipe 230.

Specifically, when the water heater 200 works, high-temperature airflow smoke generated by the main heat exchanger 220 during working enters the air duct through the air inlet 112 of the heat exchanger 100, cold water flows into the heat exchange pipeline 140, cold water in the heat exchange pipeline 140 can exchange heat with the high-temperature smoke in the air duct, the cold water in the heat exchange pipeline 140 is heated by the high-temperature smoke to preheat the cold water, and then water after heat exchange by the heat exchanger 100 flows to the main heat exchanger 220 for heat exchange. Meanwhile, the temperature of the high-temperature flue gas can be reduced after heat exchange, one part of the flue gas can be condensed into water drops, and the other part of the flue gas can be discharged out of the heat exchanger 100 through the air outlet 114, namely, the amount of the flue gas discharged out of the heat exchanger 100 through the air outlet 114 is reduced, the discharge amount of the flue gas to the outside environment is reduced, and the energy conservation and the environmental protection are facilitated.

Example 1:

as shown in fig. 1, fig. 2 and fig. 3, an embodiment of the first aspect of the present invention provides a heat exchanger 100, which includes a housing 110 and a heat exchange pipeline 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114 and an air duct 116, the air duct 116 communicates the air inlet 112 and the air outlet 114, the heat exchange pipeline 140 is provided on the housing 110, and at least a portion of the heat exchange pipeline 140 is located in the air duct 116, and the heat exchange pipeline 140 is configured to exchange heat with the air duct 116.

In detail, high temperature air (e.g., flue gas) generated by the water heater during operation enters the air duct 116 through the air inlet 112. Because at least a part of the heat exchange pipeline 140 is located in the air duct 116, cold water in the heat exchange pipeline 140 can exchange heat with high-temperature flue gas in the air duct 116, the cold water in the heat exchange pipeline 140 is heated by the high-temperature flue gas, the cold water is preheated, the heat efficiency of a water heater using the heat exchanger 100 is improved, and heat loss is reduced. Meanwhile, the temperature of the high-temperature flue gas can be reduced after heat exchange, one part of the flue gas can be condensed into water drops, and the other part of the flue gas can be discharged out of the heat exchanger 100 through the air outlet 114, namely, the amount of the flue gas discharged out of the heat exchanger 100 through the air outlet 114 is reduced, the discharge amount of the flue gas to the outside environment is reduced, and the energy conservation and the environmental protection are facilitated.

Further, the heat exchange pipeline 140 is a stainless steel corrugated pipe spirally wound up and down, the water inlet and outlet pipe sections are all arranged at the bottom of the heat exchanger, the water inlet end of the heat exchange pipeline enters the shell from the lower part of the heat exchanger, and then spirally wound to the top of the heat exchanger, and a water outlet pipe is formed in the middle of the spiral coil and extends out of the shell. The heat exchange pipeline can be close to the shell as much as possible by the arrangement, and the overall volume of the heat exchanger is reduced.

Furthermore, due to the arrangement of the air inlet and the air outlet, at least one part of the heat exchange pipeline is located in the air duct 116, high-temperature flue gas is distributed in the air duct 116, the high-temperature flue gas can be in comprehensive and direct contact with the heat exchange pipeline 140 as much as possible, the heat exchange distance between cold water in the heat exchange pipeline 140 and the high-temperature flue gas is shortened, the cold water at different positions of the heat exchange pipeline 140 can effectively exchange heat with the high-temperature flue gas, the heat exchange efficiency is favorably improved, and the heat loss is reduced. Meanwhile, the arrangement ensures the heat efficiency of the heat exchanger 100, reduces the occupancy rate of the internal space of the heat exchanger 100, is beneficial to reducing the size of the heat exchanger 100, and can realize the lightness and thinness of the heat exchanger 100.

Specifically, the air inlet 112 is communicated with an outlet of a blower of the water heater 200, and the air outlet 114 is communicated with a smoke exhaust pipe of the water heater 200.

Further, as shown in fig. 2, fig. 3, fig. 7 and fig. 8, a first opening 128 and a second opening 130 are provided on a side of the housing 110 away from the air outlet 114, and both the first opening 128 and the second opening 130 are communicated with the air duct 116; the heat exchange line 140 includes a first joint, a first connection pipe 195, a second connection pipe 196, and a second joint; a portion of the first connector extends out of the housing 110 through the first opening 128, a portion of the second connector extends out of the housing 110 through the second opening 130, and the first connection pipe 195 and the second connection pipe 196 are both located in the air duct 116; a first end of the first connection pipe 195 is connected to the first connector, the first connection pipe 195 extends spirally to form a spiral pipe body, and a second end of the first connection pipe 195 is located at the air outlet 114; the second connection pipe 196 extends from the second end of the first connection pipe 195 to a second joint, and the first connection pipe 195 and the second joint are connected by the second connection pipe 196; wherein, the spiral pipe body is arranged around the outer side of the second connecting pipe 196.

Wherein, the heat exchange line 140 includes a first joint, a first connection pipe 195, a second connection pipe 196, and a second joint. Through reasonable arrangement of the matching structure of the heat exchange pipeline 140 and the air outlet 114, the heat exchange pipeline 140 is the heat exchange pipeline 140 spirally wound up and down, and the first interface and the second interface are both located on one side of the heat exchanger 100 away from the air outlet 114. Specifically, after the first connection port of the heat exchange pipe 140 enters the housing 110 from the lower portion of the heat exchanger 100, the first connection pipe 195 is spirally wound to the top portion of the heat exchanger 100 and then extends from the second connection pipe 196 in the middle of the spiral pipe body to the second connection port. This arrangement enables heat exchange conduit 140 to be as close as possible to shell 110, reducing the overall volume of heat exchanger 100.

Further, the spiral pipe body is surrounded on the outer side of the second connecting pipe 196, and the arrangement reduces the volume of the heat exchange pipe 140 under the condition that the heat exchange pipe 140 is fixed, so that the occupancy rate of the heat exchange pipe 140 to the inner space of the heat exchanger 100 is reduced, and the overall volume of the heat exchanger 100 is favorably reduced.

Further, the first connection pipe 195 is spirally extended by properly arranging the structure of the heat exchange pipe 140 to form a spiral pipe body. The length of the heat exchange pipeline 140 in the air duct 116 is greatly increased through the structure, so that the heat exchange area between the heat exchange pipeline 140 and high-temperature flue gas in the air duct 116 is increased, the effectiveness, the stability and the feasibility of adjusting the temperature of cold water in the heat exchange pipeline 140 can be guaranteed in the process of gradually filling cold water in the heat exchange pipeline 140, the heat efficiency of a water heater using the heat exchanger 100 is improved, and the heat loss is reduced.

Example 2:

as shown in fig. 1, fig. 2 and fig. 3, on the basis of embodiment 1, embodiment 2 provides a heat exchanger 100, which includes a housing 110 and a heat exchange pipeline 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114 and an air duct 116, the air duct 116 communicates the air inlet 112 and the air outlet 114, the heat exchange pipeline 140 is provided in the housing 110, and at least a portion of the heat exchange pipeline 140 is located in the air duct 116, and the heat exchange pipeline 140 is configured to exchange heat with the air duct 116.

Further, a portion of the housing 110 is recessed away from the interior of the housing 110 to form a recess 124, the air inlet 112 is disposed in the recess 124, and the air guiding device is disposed at an opening end of the recess 124.

In detail, a part of the casing 110 is recessed towards a direction away from the inside of the casing 110 to form a recessed portion 124, and the air inlet 112 is disposed in the recessed portion 124, the recessed portion 124 has buffering and guiding functions, so that a part of air flow entering the air duct 116 from the air inlet 112 is guided to a position far away from the air outlet 114, so as to prolong a flow path of the high-temperature flue gas in the air duct 116, and further ensure an effective contact area between the high-temperature flue gas and the heat exchange pipeline 140, and further ensure a heat exchange area between cold water in the heat exchange pipeline 140 and the high-temperature flue gas, which is beneficial to improving heat exchange efficiency.

Further, as shown in fig. 7, the heat exchanger 100 further includes: the raised structure 182 is disposed in the casing 110, the air inlet 112 is located between the raised structure 182 and the air outlet 114, and a gap is formed between the raised structure 182 and the heat exchange pipe 140.

Wherein, through setting up protruding structure 182, make protruding structure 182 be located casing 110, and air intake 112 is located between protruding structure 182 and the air outlet 114, protruding structure 182 has the effect of direction, make the position department that the air outlet 114 was kept away from to the part air current between protruding structure 182 and the heat transfer pipeline 140 that passes through in the wind channel 116, in order to prolong the flow path of high temperature flue gas in wind channel 116, and then guarantee the effective area of contact of high temperature flue gas and heat transfer pipeline 140, and then guaranteed the heat transfer area of cold water and high temperature flue gas in the heat transfer pipeline 140, be favorable to promoting heat exchange efficiency.

Further, at least a portion of the raised structures are located at the sidewalls of the recesses 124.

Wherein, through the cooperation structure of reasonable protruding structure and depressed part 124 that sets up for at least a part of protruding structure is located the lateral wall department of depressed part 124, and this setting can avoid the lateral wall of depressed part 124 and the junction fracture of diapire when guaranteeing protruding structure water conservancy diversion's validity and feasibility, and can avoid the opening end department fracture of depressed part 124.

Example 3:

Further, the air inlet 112 is located on a first side of the housing 110, the air outlet 114 is located on a second side of the housing 110, and at least a portion of the heat exchange pipe 140 in the air duct 116 is located between the air inlet 112 and the air outlet 114, where the first side and the second side are two adjacent sides of the housing 110.

In detail, by properly arranging the matching structures of the intake opening 112, the exhaust opening 114 and the heat exchange pipeline 140, the intake opening 112 is located at a first side of the housing 110, the exhaust opening 114 is located at a second side of the housing 110, and at least a portion of the heat exchange pipeline 140 in the air duct 116 is located between the intake opening 112 and the exhaust opening 114, and defines the first side and the second side as two adjacent sides of the housing 110. This setting has increased the flow path of the high temperature flue gas that flows to air outlet 114 by air intake 112, has guaranteed the effective area of contact of high temperature flue gas and heat exchange pipeline 140, and then has guaranteed the heat transfer area of cold water and high temperature flue gas in the heat exchange pipeline 140, is favorable to promoting heat exchange efficiency.

Specifically, the heat exchange pipeline 140 is a stainless steel corrugated pipe spirally wound up and down, the first interface and the second interface are both disposed at the bottom of the heat exchanger 100, after the first interface of the heat exchange pipeline 140 enters the casing 110 from the lower portion of the heat exchanger 100, the first connecting pipe 195 is spirally wound to the top of the heat exchanger 100, and then the second connecting pipe 196 is formed from the middle portion of the spiral pipe, and extends out of the casing 110 through the second connector. And the air inlet 112 and the air outlet 114 are located at two adjacent sides of the casing 110, which is beneficial to slow down the flow speed of the flue gas in the air duct 116, so as to ensure that the high-temperature flue gas and the cold water in the heat exchange pipeline 140 exchange heat effectively.

In this embodiment, a portion of the heat exchange tube 140 in the air duct 116 is located between the air inlet 112 and the air outlet 114.

In other embodiments, all of the heat exchange tubes 140 in the air chute 116 are located between the air inlet 112 and the air outlet 114.

Example 4:

as shown in fig. 2 and fig. 3, on the basis of embodiment 2 or embodiment 3, embodiment 4 provides a heat exchanger 100, which includes a housing 110 and a heat exchange pipeline 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114, and an air duct 116, the air duct 116 communicates the air inlet 112 and the air outlet 114, the heat exchange pipeline 140 is provided in the housing 110, and at least a portion of the heat exchange pipeline 140 is located in the air duct 116, and the heat exchange pipeline 140 is configured to exchange heat with the air duct 116.

Further, the heat exchanger 100 further includes a flow guiding device 150, the flow guiding device 150 is located in the housing 110, the flow guiding device 150 is located at the air inlet 112, and the flow guiding device 150 is configured to guide the air flow entering the air duct 116 from the air inlet 112 to a position far away from the air outlet 114.

In detail, by arranging the flow guiding device 150 such that the flow guiding device 150 is located at the air inlet 112, the flow guiding device 150 guides the airflow entering the air duct 116 from the air inlet 112 to a position away from the air outlet 114. That is, the flow guiding device 150 has a flow path in the air duct 116 for changing the flow path of the air flow flowing into the air duct 116 from the air inlet 112, so that the high-temperature flue gas flowing from the air inlet 112 is guided to a position far away from the air outlet 114, the flow path of the high-temperature flue gas in the air duct 116 is extended, the effective contact area between the high-temperature flue gas and the heat exchange pipeline 140 is further ensured, the heat exchange area between the cold water in the heat exchange pipeline 140 and the high-temperature flue gas is further ensured, and the heat exchange efficiency is favorably improved.

If the flue gas entering the air duct 116 from the air inlet 112 directly flows to the air outlet 114, the flow path of the high temperature flue gas is shortened, and thus the high temperature flue gas cannot effectively contact with the cold water in the heat exchange pipeline 140, which results in the reduction of the heat exchange efficiency.

Example 5:

on the basis of embodiment 4, embodiment 5 provides a heat exchanger 100 including a housing 110 and a heat exchange pipeline 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114, and an air duct 116, the air duct 116 communicates the air inlet 112 and the air outlet 114, the heat exchange pipeline 140 is provided in the housing 110, and at least a portion of the heat exchange pipeline 140 is located in the air duct 116, and the heat exchange pipeline 140 is configured to be capable of exchanging heat with the air duct 116. The heat exchanger 100 further includes a deflector 150, the deflector 150 is located in the housing 110, the deflector 150 is located at the air inlet 112, and the deflector 150 is configured to deflect the air flow entering the air duct 116 from the air inlet 112 to a position away from the air outlet 114.

Further, the air guiding device 150 is a baffle configured to block a portion of the air inlet 112.

In detail, by properly arranging the matching structure of the air guiding device 150 and the air inlet 112, the air guiding device 150 is a baffle plate, and the baffle plate can block a portion of the air inlet 112, so that the air flow flows into the air duct 116 through the air inlet 112 that is not blocked. That is, the air flow flowing into the air duct 116 through the air inlet 112 that is not blocked is guided by the baffle plate that blocks the air inlet 112, so that the high temperature flue gas is guided to a position far away from the air outlet 114, so as to prolong the flow path of the high temperature flue gas in the air duct 116.

In this embodiment, a baffle plate for blocking the air inlet 112 is used to guide the air flow flowing into the air duct 116 through the air inlet 112 that is not blocked.

In other embodiments, the flow guiding plate for blocking the air inlet 112 is provided with a flow guiding portion (e.g., the flow guiding portion includes a flow guiding hole and/or a flow guiding groove), and the air flowing into the air duct 116 through the air inlet 112 that is not blocked is guided by the flow guiding portion through the outer edge of the flow guiding plate. The diversion part is obliquely arranged, so that the high-temperature flue gas is diverted to a position far away from the air outlet 114, and the flow path of the high-temperature flue gas in the air duct 116 is prolonged.

In other embodiments, a baffle plate blocks all of the air inlets 112, and a flow guiding portion (e.g., the flow guiding portion includes guiding holes and/or guiding grooves) is disposed on the baffle plate, so as to guide the air flowing into the air duct 116 through the air inlets 112 that are not blocked. The diversion part is obliquely arranged, so that the high-temperature flue gas is diverted to a position far away from the air outlet 114, and the flow path of the high-temperature flue gas in the air duct 116 is prolonged.

Specifically, the number of the flow guiding portions is multiple, the multiple flow guiding portions are arranged at intervals, and the area of the air flow passing through the flow guiding portions can be increased by the arrangement, so that the air flow flowing into the air duct 116 through the air inlet 112 is ensured.

Further, as shown in fig. 1, 2 and 3, a portion of the housing 110 is recessed away from the inside of the housing 110 to form a recess 124, the air inlet 112 is disposed in the recess 124, and the air guiding device 150 is disposed at an opening end of the recess 124.

Wherein, a portion of the housing 110 is recessed away from the interior of the housing 110 to form a recessed portion 124, the air inlet 112 is disposed in the recessed portion 124, and the air guiding device 150 is disposed at an opening end of the recessed portion 124. The arrangement makes a gap between the air inlet 112 and the flow guiding device 150, so that a buffer area is formed between the air inlet 112 and the flow guiding device 150, thereby ensuring an effective distance between the air flow and the flow guiding device 150, and providing an effective structural support for ensuring the flow guiding effect of the flow guiding device 150 on the air flow.

If the air inlet 112 directly contacts the air guiding device 150, the turning angle of the air flow is increased, the flow loss of the air flow is increased, and then the air volume is reduced, and the occurrence frequency of phenomena such as air flow separation, vortex and the like is increased, and then the problem of increasing the operation noise of the product is caused.

Specifically, the convex side of the recess 124 faces away from the middle of the housing 110, and the concave side of the recess 124 faces toward the middle of the housing 110.

In particular, the deflector 150 can close off a partial opening of the recess 124.

Further, one side wall of the housing 110 is a first side of the housing 110, a top wall of the housing 110 is a second side of the housing 110, and the flow guiding device 150 is configured to guide the airflow entering the air duct 116 from the air inlet 112 to the bottom wall of the housing 110.

Wherein, by properly setting the positions of the air inlet 112 and the air outlet 114, the air inlet 112 is located on a side wall of the housing 110, the air outlet 114 is located on a top wall of the housing 110, and the guiding device 150 is configured to be able to guide the airflow entering the air duct 116 from the air inlet 112 to the bottom wall of the housing 110. That is, the high temperature flue gas flowing to the air duct 116 through the air inlet 112 is guided to the bottom wall of the housing 110, and then flows to the top wall of the housing 110. This setting makes the high temperature flue gas can follow the top of heat transfer pipeline 140's bottom flow direction for cold water in the heat transfer pipeline 140 can effectively contact with the high temperature flue gas, and then has guaranteed the heat transfer area of cold water in the heat transfer pipeline 140 and high temperature flue gas, is favorable to promoting heat exchange efficiency. As shown in fig. 3, the arrows indicate the direction of the flue gas exiting from the waste outlet 340.

Example 6:

as shown in fig. 1, fig. 2 and fig. 3, based on any of the above embodiments, embodiment 6 provides a heat exchanger 100, which includes a housing 110 and a heat exchange pipeline 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114 and an air duct 116, the air duct 116 communicates with the air inlet 112 and the air outlet 114, the heat exchange pipeline 140 is provided in the housing 110, and at least a portion of the heat exchange pipeline 140 is located in the air duct 116, and the heat exchange pipeline 140 is configured to exchange heat with the air duct 116.

Further, the housing 110 is further provided with a water outlet 126, and the water outlet 126 is communicated with the air duct 116.

In detail, the housing 110 is further provided with a water outlet 126, and the water outlet 126 is communicated with the air duct 116. The temperature of the high-temperature flue gas in the air duct 116 can be reduced after heat exchange with the heat exchange pipeline 140, the temperature of the high-temperature flue gas can be reduced after heat exchange, and a part of the flue gas can be condensed into water drops, namely, the amount of the flue gas discharged out of the heat exchanger 100 through the air outlet 114 is reduced, the emission of the flue gas to the external environment is reduced, and the energy conservation and environmental protection are facilitated. In addition, the condensed water formed after condensation slides down the outer wall surface of the heat exchange pipe 140 and is discharged out of the heat exchanger 100 through the water discharge port 126. The setting can guarantee the dryness inside the heat exchanger 100, and avoid that the water heater breeds bacteria under the long-term wet and cold condition because a large amount of condensed water is produced in the heat exchanger 100, so that the health problem is brought to the user.

Specifically, the drain port 126 is provided in the bottom wall of the housing 110.

Specifically, the number of the drain ports 126 is plural, and the plurality of drain ports 126 are arranged at intervals, so that the smoothness and the feasibility of draining the condensed water can be ensured.

Example 7:

as shown in fig. 1, fig. 2 and fig. 3, based on any of the above embodiments, embodiment 7 provides a heat exchanger 100, which includes a housing 110 and a heat exchange pipeline 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114 and an air duct 116, the air duct 116 communicates with the air inlet 112 and the air outlet 114, the heat exchange pipeline 140 is provided in the housing 110, and at least a portion of the heat exchange pipeline 140 is located in the air duct 116, and the heat exchange pipeline 140 is configured to exchange heat with the air duct 116.

Further, the heat exchanger 100 further comprises a liquid level detection device 160, the liquid level detection device 160 is disposed on the housing 110, and the liquid level detection device 160 is located above the drain outlet 126.

In detail, by providing the liquid level detection device 160, the liquid level detection device 160 is disposed on the casing 110, and the liquid level detection device 160 is utilized to detect the level of the condensed water in the air duct 116, so as to know the water accumulation condition inside the heat exchanger 100, and provide data support for the subsequent operation of controlling the heat exchanger 100 by the water heater. In addition, whether the drain port 126 is clogged or not can be determined by the detection signal of the liquid level detection device 160. If the drain 126 is blocked, the level of condensate within the air channel 116 will gradually rise; if the drain outlet 126 is not blocked, the level of the condensed water in the air channel 116 is stable.

Further, as shown in fig. 2, the liquid level detection device 160 further includes a plurality of detection portions 162, and the plurality of detection portions 162 are arranged at intervals.

The liquid level detection device 160 further includes a plurality of detection portions 162, and the plurality of detection portions 162 may be used to detect the liquid level in the wind tunnel 116. Because the plurality of detection portions 162 are arranged at intervals, the detection of the condensate water level in the air duct 116 at a plurality of positions can be realized, and the detection precision can be ensured. In addition, a part of the detecting portions 162 can be controlled to work according to actual conditions, or all the detecting portions 162 can be controlled to work, so as to meet different use requirements and improve the use performance of the product. In addition, when one or more of the detection parts 162 are damaged, the liquid level can be detected by the rest detection parts 162, so that the normal use of the heat exchanger 100 can be ensured, and the normal use of the water heater can not be delayed.

In the present embodiment, the distances from the plurality of detecting portions 162 to the bottom wall of the housing 110 are all equal. That is, the same liquid level can be detected by the plurality of detection portions 162. Thus, when one or more of the plurality of detection parts 162 is damaged, the liquid level can be detected by the rest of the detection parts 162, so that the normal use of the heat exchanger 100 can be ensured, and the normal use of the water heater can not be delayed.

In other embodiments, the plurality of detecting portions 162 are arranged at intervals along the direction from the bottom wall to the top wall of the housing 110. By setting the distribution positions of the plurality of detection portions 162 such that the plurality of detection portions 162 are arranged at intervals in the direction from the bottom wall to the top wall of the housing 110, the detection portion 162 at a lower position detects a low liquid level, and the detection portion 162 at a higher position detects a high liquid level. That is, different liquid levels are detected by the plurality of detection portions 162. For example, the low liquid level is the liquid level when the heat exchanger 100 is operating normally, and the high liquid level is the alarm level when the drain port 126 is blocked. This arrangement provides effective data support for subsequent adjustment of the operating conditions of the heat exchanger 100.

Example 8:

The heat exchange pipeline 140 is a stainless steel corrugated pipe spirally wound up and down, the water inlet and outlet pipe sections are all arranged at the bottom of the heat exchanger 100, the water inlet end of the heat exchange pipeline 140 enters the shell 110 from the lower part of the heat exchanger 100, then the heat exchange pipeline is spirally wound to the top of the heat exchanger 100, and then a water outlet pipe is formed in the middle of the spiral coil and extends out of the shell 110. This arrangement allows heat exchange conduit 140 to be as close to shell 110 as possible, reducing the overall volume of heat exchanger 100.

Further, as shown in fig. 8, the heat exchanger 100 further includes: fixing device 183, fixing device 183 are provided with a plurality of elasticity and detain position 184, and arbitrary layer of body joint is in an elasticity detains position 184 in the heliciform body.

Wherein, through still setting up fixing device 183 for fixing device 183 sets up a plurality of elasticity and detains position 184, utilizes elasticity to detain any layer body in the position 184 fixed heliciform body, in order to reach the purpose that utilizes a plurality of elasticity to detain the interval between the position 184 assurance each layer body, is favorable to promoting the holistic structural strength of heat transfer pipeline 140.

It can be understood that the inner diameter of the elastic buckle 184 is smaller than the outer diameter of the tube to ensure the stability of the elastic buckle 184 and the tube, and avoid the situation that the fixing device 183 falls off from the spiral tube.

Further, as shown in fig. 8, a separating portion 185 is connected between any two adjacent elastic buckling positions 184, and the separating portion 185 is inserted between two adjacent layers of the spiral tube.

The partition 185 is arranged, so that the partition 185 is connected between any two adjacent elastic buckling positions 184, when the spiral pipe body of the fixing device 183 is assembled, the partition 185 is inserted between two adjacent pipe bodies in the spiral pipe body, and the partition 185 has the function of separating the two adjacent pipe bodies to ensure the distance between the two adjacent pipe bodies. When an external force acts on the spiral pipe, the partition 185 has an effect of slowing down the external force, so as to reduce the probability of breakage of the spiral pipe, which is beneficial to prolonging the service life of the spiral pipe.

Specifically, the partition 185 is integrally connected with the elastic catch 184. For example, the fixing device 183 is formed by bending a stainless steel plate.

Further, as shown in fig. 8, the number of the fixing devices 183 is plural, and the plural fixing devices 183 are distributed at intervals outside the spiral pipe body.

Wherein, through the cooperation structure of rationally setting up a plurality of fixing device 183 and heliciform body for a plurality of fixing device 183 interval distribution has increased the area of contact of fixing device 183 with the heliciform body in the outside of heliciform body, should set up, has richened the contact angle of fixing device 183 with the heliciform body, is favorable to promoting intensity, steadiness and the reliability of assembly.

Example 9:

Further, the heat exchanger 100 further comprises a seal 170, the seal 170 being configured to seal a connection of the first joint 191 to the first opening 128 and to seal a connection of the second joint 192 to the second opening 130.

In detail, the heat exchanger 100 further includes a sealing member 170, and the sealing member 170 is used to seal a connection between the first joint 191 and the first opening 128 and seal a connection between the second joint 192 and the second opening 130, so as to prevent high-temperature flue gas in the air duct 116 from leaking from the connection between the heat exchange pipeline 140 and the first opening 128 and the second opening 130, and ensure airtightness of the connection between the heat exchange pipeline 140 and the first opening 128 and the second opening 130.

Specifically, the sealing member 170 is a silicone sealing ring.

Specifically, the heat exchanger 100 further includes a hydrophilic layer covering the outer wall surface of the heat exchange pipe 140. Because the hydrophilic layer is arranged, the condensed high-temperature flue gas can not be condensed into small drops at the heat exchange pipeline 140, but forms a water film to spread, so that the condensed water is reduced, and the occurrence probability that the water outlet 126 is blocked can be reduced.

Further, as shown in fig. 8, the heat exchanger 100 further includes: and a fixing member 193, a portion of the first connector 191 located in the housing 110 and a portion of the second connector 192 located in the housing 110 are connected by the fixing member 193.

Wherein, by arranging the fixing member 193 such that the portion of the first joint 191 located in the housing 110 and the portion of the second joint 192 located in the housing 110 are connected by the fixing member 193, the fixing member 193 plays a role of fixing the first joint 191 and the second joint 192, so as to ensure the distance between the first joint 191 and the second joint 192, which is beneficial to improving the overall structural strength of the heat exchange pipeline 140. Therefore, the assembly of the heat exchange pipeline 140 and the shell 110 is facilitated, the phenomenon that the first joint 191 and the second joint 192 rotate to cause installation springback when the heat exchange pipeline 140 and the shell 110 are assembled by using a fastening piece can be prevented, the assembly process is simplified, and the assembly efficiency is improved.

Example 10:

as shown in fig. 8 and 9, based on any of the above embodiments, embodiment 10 provides a heat exchanger 100, which includes a housing 110 and a heat exchange pipeline 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114, and an air duct 116, the air duct 116 communicates the air inlet 112 and the air outlet 114, the heat exchange pipeline 140 is provided in the housing 110, and at least a portion of the heat exchange pipeline 140 is located in the air duct 116, and the heat exchange pipeline 140 is configured to exchange heat with the air duct 116.

Further, the heat exchanger 100 further includes: the one-way flow guiding element 186 is located at the air outlet 114, and the one-way flow guiding element 186 is suitable for conducting in a one-way direction from the inside of the housing 110 to the outside of the housing 110.

In detail, by providing the one-way guiding element 186, the one-way guiding element 186 is located at the air outlet 114, so that the smoke in the air duct 116 can be discharged out of the heat exchanger 100 through the one-way guiding element 186, but the airflow outside the heat exchanger 100 cannot enter the air duct 116 through the one-way guiding element 186. The arrangement can prevent cold air from flowing backwards from the outside of the heat exchanger 100 through the air outlet 114 into the air duct 116, so that the heat exchange pipeline 140 is frozen, the heat exchange pipeline 140 is protected, and the service life of the heat exchanger 100 is prolonged.

Further, as shown in fig. 9, the one-way flow guide 186 includes: a support plate 187 connected to the wall of the air outlet 114, the support plate 187 having a diversion opening and a stopper portion, the stopper portion being located on the periphery of the diversion opening; blades rotatably connected to the support plate 187, the blades rotating to open or close the diversion port; when the blade blocks the flow guide opening, the edge of the blade is abutted against the stopping part.

Wherein the one-way guide 186 includes a support plate 187 and a vane. Through the cooperation structure of reasonable setting backup pad 187 and blade for backup pad 187 is connected with the oral wall of air outlet 114, and backup pad 187 has the effect of supporting the blade. Since the supporting plate 187 is provided with the diversion opening and the stopping portion, and the stopping portion is located on the periphery of the diversion opening, the stopping portion has the function of limiting the rotation angle of the blade, so that the blade can only turn outwards to conduct the diversion opening along the direction from the inside of the casing 110 to the outside of the casing 110, and cannot turn inwards to conduct the diversion opening along the direction from the outside of the casing 110 to the inside of the casing 110. That is, the stopping portion, the diversion opening and the blade cooperate to achieve the purpose of one-way conduction of the one-way diversion element 186 along the direction from the inside of the casing 110 to the outside of the casing 110.

Further, as shown in fig. 9, the one-way guiding element 186 further includes: a shaft 188 provided on the support plate 187; the vane includes a first sub-piece 189 and a second sub-piece 190, the first sub-piece 189 and the second sub-piece 190 are both rotatably connected with the support plate 187 through a rotating shaft 188, and the first sub-piece 189 and the second sub-piece 190 are arranged in a mirror image mode by taking the rotating shaft 188 as a center.

The one-way guiding element 186 further includes a rotating shaft 188, and the vane includes a first sub-piece 189 and a second sub-piece 190. Through reasonable arrangement of the matching structure of the rotating shaft 188, the first sub-piece 189 and the second sub-piece 190 are both connected with the supporting plate 187 through the rotating shaft 188 in a rotating mode, the first sub-piece 189 and the second sub-piece 190 are arranged in a mirror image mode with the rotating shaft 188 as the center, and the first sub-piece 189 and the second sub-piece 190 are in rotating conduction or block the diversion port.

It will be appreciated that the first sub-segment 189 and the second sub-segment 190 are both rotatable about the rotation axis 188, and the rotation axis 188 defines the position of the first sub-segment 189 and the second sub-segment 190 relative to the flow guide opening, thereby providing effective structural support for the first sub-segment 189 and the second sub-segment 190 to open or close the flow guide opening.

In other embodiments, the blades are rotatably coupled to the support plate 187 by a shaft 188.

In other embodiments, there are a plurality of blades and a plurality of shafts 188, and each blade is rotatably coupled to one of the shafts 188.

Example 11:

as shown in fig. 8, based on any of the above embodiments, embodiment 11 provides a heat exchanger 100, which includes a housing 110 and a heat-exchange pipeline 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114, and an air duct 116, the air duct 116 communicates the air inlet 112 and the air outlet 114, the heat-exchange pipeline 140 is provided on the housing 110, and at least a portion of the heat-exchange pipeline 140 is located in the air duct 116, and the heat-exchange pipeline 140 is configured to exchange heat with the air duct 116.

Further, the heat exchanger 100 further includes: the temperature controller 194 is disposed on the housing 110, and the temperature controller 194 is used for detecting the temperature of the air duct 116.

Wherein, through setting up temperature controller 194 for temperature controller 194 is located casing 110, utilizes temperature controller 194 to detect the temperature of wind channel 116, makes the flue gas temperature in the wind channel 116 controllable, avoids leading to heat exchanger 100 thermal deformation or even the condition of burning out to take place because of wind channel 116 high temperature, is favorable to promoting security and the reliability that heat exchanger 100 used.

Example 12:

as shown in fig. 2, based on any of the above embodiments, embodiment 12 provides a heat exchanger 100, which includes a housing 110 and a heat-exchange duct 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114, and an air duct 116, the air duct 116 communicates the air inlet 112 and the air outlet 114, the heat-exchange duct 140 is provided in the housing 110, and at least a portion of the heat-exchange duct 140 is located in the air duct 116, and the heat-exchange duct 140 is configured to exchange heat with the air duct 116.

Further, the housing 110 includes: an upper cover plate 118, wherein the upper cover plate 118 is provided with an air outlet 114; a lower cover plate 120; the middle shell 122 is located between the upper cover plate 118 and the lower cover plate 120, the middle shell 122 is provided with an air inlet 112, and the upper cover plate 118, the middle shell 122 and the lower cover plate 120 surround the air passage 116.

The housing 110 includes an upper cover plate 118, a lower cover plate 120 and a middle shell 122, the middle shell 122 is located between the upper cover plate 118 and the lower cover plate 120, one end of the middle shell 122 is connected to the upper cover plate 118, the other end of the middle shell 122 is connected to the lower cover plate 120, and the upper cover plate 118, the middle shell 122 and the lower cover plate 120 surround the air duct 116. The middle shell 122 is provided with an air inlet 112, and the upper cover plate 118 is provided with an air outlet 114, that is, after entering the air duct 116 from the side of the shell 110 to exchange heat with the heat exchange pipeline 140, the high-temperature flue gas flows out of the heat exchanger 100 from the top of the shell 110.

Example 13:

as shown in fig. 8, based on any one of embodiments 1 to 11, embodiment 13 provides a heat exchanger 100 including a housing 110 and a heat exchange pipeline 140, where the heat exchanger 100 includes the housing 110, the housing 110 is provided with an air inlet 112, an air outlet 114, and an air duct 116, the air duct 116 communicates the air inlet 112 and the air outlet 114, the heat exchange pipeline 140 is provided in the housing 110, and at least a portion of the heat exchange pipeline 140 is located in the air duct 116, and the heat exchange pipeline 140 is configured to exchange heat with the air duct 116.

Further, the housing 110 includes: the main body part 132, the main body part 132 is a groove structure, and the side wall of the groove structure is provided with an air inlet 112; the reinforcing ribs are arranged on the main body part 132, one part of the reinforcing ribs is connected with the side wall of the groove structure, and the other part of the reinforcing ribs is connected with the bottom wall of the groove structure; an upper cover plate 118 covering the opening end of the groove structure, the upper cover plate 118 being provided with an air outlet 114, and the main body 132 and the upper cover plate 118 enclosing an air outlet channel 116.

In detail, the case 110 includes a body portion 132, reinforcing ribs, and an upper cover 118. The main body 132 is a groove structure, the upper cover plate 118 covers an opening end of the groove structure, and the main body 132 and the upper cover plate 118 surround the air outlet duct 116. The side wall of the groove structure is provided with an air inlet 112, and the upper cover plate 118 is provided with an air outlet 114, that is, after the high-temperature flue gas enters the air duct 116 from the side part of the casing 110 to exchange heat with the heat exchange pipeline 140, the high-temperature flue gas flows out of the heat exchanger 100 from the top part of the casing 110.

Further, a part of the reinforcing rib is connected with the side wall of the groove structure, the other part of the reinforcing rib is connected with the bottom wall of the groove structure, and the reinforcing rib has the function of reinforcing the main body part 132, so that the structural strength of the main body part 132 is improved.

Example 14:

as shown in fig. 4 and 5, an embodiment of the second aspect of the present invention proposes a water heater including: the heat exchanger 100 of any embodiment of the first aspect.

The present invention provides a water heater comprising a heat exchanger 100 as in any embodiment of the first aspect. High temperature air (e.g., flue gas) generated by the operation of the water heater enters the air duct 116 through the air inlet 112. Because at least a part of the heat exchange pipeline 140 is located in the air duct 116, cold water in the heat exchange pipeline 140 can exchange heat with high-temperature flue gas in the air duct 116, the cold water in the heat exchange pipeline 140 is heated by using the high-temperature flue gas, the effect of preheating the cold water is achieved, the heat efficiency of a water heater using the heat exchanger 100 is favorably improved, and heat loss is reduced. Meanwhile, the temperature of the high-temperature flue gas can be reduced after heat exchange, one part of the flue gas can be condensed into water drops, and the other part of the flue gas can be discharged out of the heat exchanger 100 through the air outlet 114, namely, the amount of the flue gas discharged out of the heat exchanger 100 through the air outlet 114 is reduced, the discharge amount of the flue gas to the outside environment is reduced, and the energy conservation and the environmental protection are facilitated.

Meanwhile, the heat exchange pipeline 140 is a stainless steel corrugated pipe spirally wound up and down, the water inlet and outlet pipe sections are all arranged at the bottom of the heat exchanger 100, the water inlet end of the heat exchange pipeline enters the shell 110 from the lower part of the heat exchanger 100, then the heat exchange pipeline is spirally wound to the top of the heat exchanger 100, and then the water outlet pipe formed from the middle part of the spiral pipe extends out of the shell 110. This arrangement allows the heat exchange circuit to be as close to the housing 110 as possible, reducing the overall volume of the heat exchanger 100.

Example 15:

as shown in fig. 4 and 5, on the basis of the above embodiment 14, embodiment 15 provides a water heater 200 including: the heat exchanger comprises a heat exchanger 100, a water inlet pipe 210, a main heat exchanger 220 and a water outlet pipe 230, wherein the water inlet pipe 210 is communicated with the heat exchanger 100, the main heat exchanger 220 comprises a smoke outlet, a heat exchange inlet and a heat exchange outlet, the heat exchange inlet is communicated with the heat exchanger 100, and the smoke outlet is communicated with an air inlet 112; and a water outlet pipe 230, wherein the water outlet pipe 230 is communicated with the heat exchange outlet.

In detail, the water heater 200 further includes a water inlet pipe 210, a main heat exchanger 220, and a water outlet pipe 230. Through reasonable arrangement of the matching structure of the water inlet pipe 210, the main heat exchanger 220, the water outlet pipe 230 and the heat exchanger 100, the water inlet pipe 210 is communicated with the heat exchanger 100, the heat exchange inlet of the main heat exchanger 220 is communicated with the heat exchanger 100, the smoke outlet of the main heat exchanger 220 is communicated with the air inlet 112 of the heat exchanger 100, and the water outlet pipe 230 is communicated with the heat exchange outlet of the main heat exchanger 220. Thus, when the water heater 200 works, cold water enters the heat exchanger 100 through the water inlet pipe 210 for heat exchange, then exchanges heat through the main heat exchanger 220, and then flows out through the water outlet pipe 230.

Specifically, when the water heater 200 works, high-temperature airflow generated by the main heat exchanger 220 during working is that smoke enters the air duct through the air inlet 112 of the heat exchanger 100, cold water flows into the heat exchange pipeline 140, cold water in the heat exchange pipeline 140 can exchange heat with the high-temperature smoke in the air duct, the cold water in the heat exchange pipeline 140 is heated by the high-temperature smoke to preheat the cold water, and then water after heat exchange by the heat exchanger 100 flows to the main heat exchanger 220 for heat exchange. Meanwhile, the temperature of the high-temperature flue gas is reduced after heat exchange, one part of the flue gas is condensed into water drops, and the other part of the flue gas is discharged out of the heat exchanger 100 through the air outlet 114, so that the amount of the flue gas discharged out of the heat exchanger 100 through the air outlet 114 is reduced, the discharge amount of the flue gas to the external environment is reduced, and the energy conservation and environmental protection are facilitated.

That is to say, through the cooperation structure of rationally setting up heat exchanger 100 and main heat exchanger 220, when promoting the heating efficiency of water heater 200, reduced the outer flue gas volume of arranging of water heater 200, be favorable to realizing energy-concerving and environment-protective.

Further, as shown in fig. 4, the water heater 200 further includes a hood 250, a fan assembly 260, and a burner 270, the hood 250 being in communication with the smoke exhaust, the fan assembly 260 being in communication with the hood 250 and the air intake 112, the burner 270 being in communication with the primary heat exchanger 220, the primary heat exchanger 220 being located between the burner 270 and the hood 250.

Therein, the water heater 200 further includes a smoke cage 250, a fan assembly 260, and a burner 270. The smoke hood 250 is connected with the smoke outlet of the main heat exchanger 220 and the fan assembly 260, and the smoke hood 250 has the functions of guiding and converging, so that smoke exhausted by the main heat exchanger 220 flows to the fan assembly 260 along a flow channel formed on the inner wall of the smoke hood 250. The flue gas velocity of the exhaust port of the main heat exchanger 220 is high, and the flue gas flows through the smoke hood 250, so that the turning of the air flow can be reduced, the flow loss of the air flow is reduced, more energy is converted into dynamic pressure, the air quantity is improved, the phenomenon that the flow loss of the air flow is high due to the high velocity is avoided, the pneumatic performance is poor, the air quantity is reduced, meanwhile, the smoke hood 250 also has the flow collecting effect, the frequency of the phenomena of air flow separation, vortex and the like is reduced, and the running noise of the product is reduced.

Further, the petticoat pipe 250 is located between the exhaust port of fan subassembly 260 and main heat exchanger 220, and this setting can avoid the high temperature flue gas direct action of main heat exchanger 220 exhaust to fan subassembly 260, and leads to fan subassembly 260 to be scalded the condition of damaging and take place, can protect fan subassembly 260 when guaranteeing fan subassembly 260 normal operating, is favorable to prolonging fan subassembly 260's life.

Further, the burner 270 is connected to the main heat exchanger 220, the main heat exchanger 220 is located between the burner 270 and the hood 250, the burner 270 operates to generate heat, and the main heat exchanger 220 absorbs the heat generated by the combustion of the burner 270 and exchanges the absorbed heat with water flowing through the main heat exchanger 220 to heat the water.

Specifically, as shown in fig. 5, the water heater 200 further includes a gas pipe 350, the gas pipe 350 is communicated with the burner 270, an arrow indicates a direction in which cold water flows into the water inlet pipe 210, an arrow indicates a direction in which hot water flows out of the water outlet pipe 230, an arrow indicates a direction in which gas flows into the gas pipe 350, and an arrow indicates a direction in which smoke of the heat exchanger 100 is discharged.

Example 16:

as shown in fig. 4 and 6, on the basis of the above embodiment 14 or embodiment 15, embodiment 12 provides a water heater 200 including: the heat exchanger 100, a drain pipe 280 and a water seal 290, wherein the drain pipe 280 is connected with a drain port of the heat exchanger 100, the water seal 290 is connected with the drain pipe 280, and the water seal 290 comprises an alkaline part.

In detail, the water heater 200 further includes a drain pipe 280 and a water seal 290. The drain pipe 280 is connected to a drain port of the heat exchanger 100, and the heat exchanger 100 operates to drain the generated condensed water through the drain pipe 280. Since the water seal 290 is connected to the drain pipe 280, the condensed water flows through the water seal 290, the condensed water is weakly acidic, and the alkaline portion of the water seal 290 neutralizes the condensed water through the water seal 290, so as to improve the acidity and alkalinity of the condensed water and reduce the influence of the discharged condensed water on the environment.

Specifically, the alkaline portion includes limestone, which is spread within the water seal.

Specifically, as shown in fig. 5, the arrow indicates the direction in which the condensed water is discharged out of the drain pipe 280.

Further, as shown in fig. 6, the water seal 290 further includes: the outer barrel 292 is connected with the drain pipe 280, the outer barrel 292 comprises a first pipe 294 and a second pipe 296, the second pipe 296 is located on the periphery of the first pipe 294, one end of the first pipe 294 is communicated with the drain pipe 280, and the other end of the first pipe 294 is communicated with the second pipe 296; at least a part of the inner barrel 298 extends into the second pipe 296, a first flow channel 300 is enclosed between the outer wall of the first pipe 294 and the inner wall of the inner barrel 298, a second flow channel 302 is enclosed between the outer wall of the inner barrel 298 and the inner wall of the second pipe 296, and the first flow channel 300 is communicated with the first pipe 294 and the second flow channel 302.

The water seal unit 290 further includes an inner barrel 298 and an outer barrel 292, wherein the outer barrel 292 includes a first pipe 294 and a second pipe 296. Through reasonable arrangement of the matching structure of the inner barrel 298 and the outer barrel 292, a first flow channel 300 is enclosed between the outer wall of the first pipe 294 and the inner wall of the inner barrel 298, a second flow channel 302 is enclosed between the outer wall of the inner barrel 298 and the inner wall of the second pipe 296, and the first flow channel 300 is communicated with the first pipe 294 and the second flow channel 302. That is, the condensed water sequentially flows through the first pipe 294, the first flow channel 300, and the second flow channel 302, and is discharged from the inner tub 298. This setting has limited the flow path of comdenstion water, and in the comdenstion water flowed into water seal 290, the comdenstion water reached a certain amount after, just can cross the tip that stretches into the inside interior bucket 298 of outer bucket 292 and flow to second runner 302, promptly when guaranteeing the exhaust validity of comdenstion water, can play the effect of blockking the inside flue gas of heat exchanger 100 and passing through drain pipe 280 exhaust, promptly avoid the flue gas to reveal by drain pipe 280 yet, in order to guarantee security and the reliability that water heater 200 used, the performance and the market competition of product have been promoted.

Specifically, the inner barrel 298 and the outer barrel 292 are detachably connected, and the arrangement facilitates cleaning and cleaning of the water seal 290, so that the use sanitation of the water seal 290 can be ensured, bacteria breeding can be avoided, and the water seal 290 can be recycled.

Specifically, the inner barrel 298 and the outer barrel 292 are integrally connected, so that the overall structure of the product is simplified, the cost of the product is reduced, and the reliability and stability of the product structure are ensured.

Wherein arrows indicate the flow path of the condensed water, as shown in fig. 6.

Further, the inner barrel 298 is provided with a diversion hole 304 and a stopping portion 306, the diversion hole 304 is communicated with the second flow passage 302, the diversion hole 304 is located between the stopping portion 306 and the other end of the first pipe 294, and the stopping portion 306 abuts against the inner wall of the second pipe 296; the water seal 290 further includes a sealing portion 308, and the sealing portion 308 is used for sealing the connection between the stopper 306 and the second tube 296.

The inner barrel 298 is provided with a diversion hole 304, and the diversion hole 304 is communicated with the second flow passage 302, so that the condensed water in the second flow passage 302 flows into the inner barrel 298 through the diversion hole 304 and is discharged out of the water seal 290.

Further, the inner barrel 298 further comprises a stopping portion 306, the diversion hole 304 is located between the stopping portion 306 and the other end of the first tube 294, and the sealing portion 308 is used for sealing a gap between the stopping portion 306 and the inner wall of the second tube 296, this arrangement defines a flow path of the condensed water, the condensed water is prevented from directly discharging out of the water seal 290 through the second flow channel 302, and an effective structural support is provided for preventing the smoke from leaking out.

Specifically, the sealing portion 308 is a gasket.

Example 17:

as shown in fig. 4, on the basis of the above embodiment 14, embodiment 17 provides a water heater 200 including: the heat exchanger comprises a heat exchanger 100, a cover body, a control device 320 and an alarm device, wherein the control device 320 is arranged on the cover body, the control device 320 is connected with a liquid level detection device 160 of the heat exchanger 100, the alarm device is connected with the control device 320, and the control device 320 is configured to be capable of controlling the alarm device to work according to a detection signal of the liquid level detection device 160.

The alarm device and the liquid level detection device 160 of the heat exchanger 100 are both connected to the control device 320, and the control device 320 is configured to control the alarm device to operate according to a detection signal of the liquid level detection device 160. For example, when the liquid level detection device 160 detects that the liquid level in the air duct 116 is high, the control device 320 controls the alarm device to operate to issue a prompt according to the detection signal of the liquid level detection device 160, so as to remind the user that the water heater is in an abnormal operation state and needs to be serviced. The safety and the reliability of the water heater can be guaranteed by the arrangement.

Further, the water heater further comprises a display device, the display device is disposed on the cover body, the display device is connected with the control device 320, and the control device 320 is configured to control the display device to operate according to a detection signal of the liquid level detection device 160.

When the liquid level detection device 160 detects that the liquid level in the air duct 116 is higher, the control device 320 controls the display device to work according to a detection signal of the liquid level detection device 160 to display that the water heater is currently in an abnormal operation state, so as to remind a user of paying attention to the water heater and needing to be overhauled. The safety and the reliability of the water heater can be guaranteed by the arrangement.

Example 18:

the heat exchanger 100 includes: housing 110, deflector 150, level detection device 160, heat exchange tubing 140 (e.g., heat exchange coil), nut 180, and seal 170. The housing 110 includes: an air inlet 112, a middle shell 122, an upper cover plate 118, an air outlet 114, a lower cover plate 120 and a water outlet 126. One end of the middle shell 122 is connected to the upper cover plate 118, the other end of the middle shell 122 is connected to the lower cover plate 120, and the nut 180 is used for locking the end of the heat exchange pipe 140 extending out of the shell 110 with the wall surface of the shell 110.

After entering from the air inlet 112, the flue gas is guided by the guiding device 150 to pass through the bottom of the air duct 116, and flows through the middle of the heat exchange coil and other gaps, the cold water flows into the heat exchange coil, and the cold water absorbs and exchanges heat with the flue gas flowing on the surface of the heat exchange coil, so as to achieve the purpose of preheating.

When the temperature of the flue gas drops to a certain temperature and reaches a dew point, the flue gas is condensed into water drops, slides down from the surface of the pipe wall of the heat exchange coil and is discharged through a water outlet 126.

When the drainage outlet 126 is blocked, the condensed water will increase continuously, a short circuit will be formed when the water level in the air duct 116 rises to the liquid level detection device 160, the control device 320 of the water heater will control the combustion device of the water heater to stop working according to the detection signal (e.g. current change signal) of the liquid level detection device 160, and control the alarm device to give out a buzzing warning, and control the display device (e.g. display screen) to display an error code.

The device can realize the recovery of partial heat discharged by the flue gas, save energy and reduce emission, improve the heat exchange efficiency and achieve the first-level energy efficiency.

Example 19:

the water heater 200 includes a blower assembly 260, a smoke cage 250, a main heat exchanger 220, a burner 270, a heat exchanger 100, a water pump 240, a control device 320, a gas proportional valve 310, a drain 280, and a water seal 290.

When the user uses the hot water function of the water heater 200, the cold water flows into the water inlet pipe 210 and passes through the water flow sensor, which feeds back the inlet water temperature and the flow signal to the control device 320. The fan assembly 260 starts to work, the wind pressure sensor receives a signal and feeds back the signal to the control device 320, the gas proportional valve 310 is opened and starts to ignite, water flows through the water outlet valve body, the water outlet temperature detected by the water outlet valve body is fed back to the control device 320, the control device 320 controls gas flow according to the temperature set by a user, and hot water with stable temperature is conveyed to the user.

When the user uses the zero-cold-water function, the water pump 240 is started to pump the cold water at the outlet of the water outlet pipe 230 back to the heat exchanger 100 for heat exchange, the heating is stopped when the temperature set by the user is reached, the user opens hot water at any water using point, and the pain that the user needs to put a section of cold water to discharge the hot water in the related art is avoided.

When the water heater 200 operates, cold water firstly passes through the heat exchanger 100, the heat exchange pipeline 140 of the heat exchanger 100 is a corrugated pipe, smoke passes through the surface of the corrugated pipe, heat is transferred to the cold water, and the cold water can be preheated to a certain temperature, so that the purposes of saving energy and improving efficiency are achieved.

When the water heater 200 is in operation, the flue gas and the corrugated pipe continuously exchange heat, when the temperature of the flue gas reaches the dew point temperature, condensed water is generated and collected at the bottom and flows out of the drain pipe 280, the condensed water is weakly acidic, and the condensed water passes through the alkaline part of the bottom water seal 290 and flows out of the water heater 200 after being neutralized by acid and alkali. Wherein, the water seal 290 can prevent the leakage of the flue gas. Specifically, as shown in fig. 5, the water heater 200 further includes a water tank 330, and the water tank 330 is connected to the water outlet pipe 230.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchanger, comprising:

the air conditioner comprises a shell, a fan and a fan, wherein the shell is provided with an air inlet, an air outlet and an air duct, and the air duct is communicated with the air inlet and the air outlet;

the heat exchange pipeline is arranged on the shell, at least one part of the heat exchange pipeline is positioned in the air duct, and the heat exchange pipeline is configured to exchange heat with the air duct.

2. The heat exchanger of claim 1,

a first opening and a second opening are formed in one side, away from the air outlet, of the shell, and the first opening and the second opening are communicated with the air duct;

the heat exchange pipeline comprises a first joint, a first connecting pipe, a second connecting pipe and a second joint;

a part of the first joint extends out of the shell through the first opening, a part of the second joint extends out of the shell through the second opening, and the first connecting pipe and the second connecting pipe are both positioned in the air duct;

the first end of the first connecting pipe is connected with the first joint, the first connecting pipe extends spirally to form a spiral pipe body, and the second end of the first connecting pipe is positioned at the air outlet;

the second connecting pipe extends from the second end of the first connecting pipe to the second joint, and the first connecting pipe and the second joint are connected through the second connecting pipe;

wherein, the heliciform body encloses and locates the outside of second connecting pipe.

3. The heat exchanger of claim 2,

one part of the shell is sunken towards the direction deviating from the inner part of the shell to form a sunken part, and the air inlet is formed in the sunken part.

4. The heat exchanger of claim 3, further comprising:

the convex structure is arranged in the shell, the air inlet is positioned between the convex structure and the air outlet, and a gap is formed between the convex structure and the heat exchange pipeline.

5. The heat exchanger of claim 4,

at least a portion of the raised structures are located at sidewalls of the recesses.

6. The heat exchanger according to any one of claims 1 to 5,

the air inlet is positioned on the first side of the shell, the air outlet is positioned on the second side of the shell, and at least one part of the heat exchange pipeline in the air duct is positioned between the air inlet and the air outlet;

wherein the first side and the second side are adjacent sides of the housing.

7. The heat exchanger of claim 6, further comprising:

the flow guide device is positioned in the shell and positioned at the air inlet, and the flow guide device is configured to guide the air flow entering the air channel from the air inlet to a position far away from the air outlet.

8. The heat exchanger of claim 7,

the flow guide device is a flow guide plate, and the flow guide plate is configured to be capable of blocking a part of the air inlet.

9. The heat exchanger of claim 7,

the lateral wall of one side of the shell is the first side of the shell, the top wall of the shell is the second side of the shell, and the flow guide device is configured to guide the airflow entering the air duct from the air inlet to the bottom wall of the shell.

10. The heat exchanger according to any one of claims 1 to 5,

the shell is further provided with a water outlet which is communicated with the air duct.

11. The heat exchanger of claim 10, further comprising:

the liquid level detection device is arranged on the shell and is positioned above the water outlet.

12. The heat exchanger of claim 11, wherein the liquid level detection device further comprises:

a plurality of detection portions arranged at intervals.

13. The heat exchanger of claim 12,

the distances from the plurality of detection parts to the bottom wall of the shell are all equal; or

The plurality of detection portions are arranged at intervals in a direction from the bottom wall to the top wall of the housing.

14. The heat exchanger of any one of claims 2 to 5, further comprising:

the fixing device is provided with a plurality of elastic buckling positions, and any layer of the spiral pipe body is clamped in one of the elastic buckling positions.

15. The heat exchanger of claim 14,

a partition part is connected between any two adjacent elastic buckling positions and is inserted between two adjacent layers of the spiral pipe bodies; and/or

The number of the fixing devices is multiple, and the fixing devices are distributed on the outer side of the spiral pipe body at intervals.

16. The heat exchanger of any one of claims 1 to 5, further comprising:

and the one-way flow guide piece is positioned at the air outlet and is suitable for one-way conduction along the direction from the inside of the shell to the outside of the shell.

17. The heat exchanger of claim 16, wherein the one-way flow guide comprises:

the supporting plate is connected with the opening wall of the air outlet and is provided with a flow guide opening and a stopping part, and the stopping part is positioned on the peripheral side of the flow guide opening;

the blades are rotatably connected with the supporting plate and rotate to conduct or block the diversion port;

when the blade blocks the diversion port, the edge of the blade is abutted against the stopping part.

18. The heat exchanger of claim 17, wherein the one-way flow guide further comprises:

the rotating shaft is arranged on the supporting plate;

the blade includes first sub-piece and second sub-piece, first sub-piece with the second sub-piece all passes through the pivot with the backup pad is rotated and is connected, first sub-piece with the second sub-piece with the pivot is the central mirror image and arranges.

19. The heat exchanger of any one of claims 2 to 5, further comprising:

a seal configured to seal a junction of the first fitting and the first opening and to seal a junction of the second fitting and the second opening.

20. The heat exchanger of any one of claims 2 to 5, further comprising:

and the part of the first joint in the shell and the part of the second joint in the shell are connected through the fixing piece.

21. The heat exchanger of any one of claims 1 to 5, further comprising:

the temperature controller is arranged on the shell and used for detecting the temperature of the air duct.

22. The heat exchanger of any one of claims 1 to 5, wherein the housing comprises:

the upper cover plate is provided with the air outlet;

a lower cover plate;

the middle shell is positioned between the upper cover plate and the lower cover plate, the middle shell is provided with the air inlet, and the air duct is surrounded by the upper cover plate, the middle shell and the lower cover plate.

23. The heat exchanger of any one of claims 1 to 5, wherein the housing comprises:

the main body part is of a groove structure, and the side wall of the groove structure is provided with the air inlet;

the reinforcing ribs are arranged on the main body part, one part of the reinforcing ribs is connected with the side wall of the groove structure, and the other part of the reinforcing ribs is connected with the bottom wall of the groove structure;

the upper cover plate covers the opening end of the groove structure, the upper cover plate is provided with the air outlet, and the main body part and the upper cover plate surround the air channel.

24. A water heater, comprising:

a heat exchanger as claimed in any one of claims 1 to 23.

25. The water heater of claim 24, further comprising:

the water inlet pipe is communicated with the heat exchanger;

the main heat exchanger comprises a smoke outlet, a heat exchange inlet and a heat exchange outlet, the heat exchange inlet is communicated with the heat exchanger, and the smoke outlet is communicated with the air inlet;

and the water outlet pipe is communicated with the heat exchange outlet.

26. The water heater of claim 25, further comprising:

the water pump, the water pump with the import of inlet tube with the export of outlet pipe is linked together, the water pump is followed the export of outlet pipe extremely the import direction one-way conduction of inlet tube.

27. The water heater of claim 25, further comprising:

the smoke hood is communicated with the smoke exhaust port;

the fan assembly is communicated with the smoke cover and the air inlet;

the combustor is connected with the main heat exchanger, and the main heat exchanger is located the combustor with between the petticoat pipe.

28. The water heater as recited in any one of claims 24 to 27, further comprising:

the water discharge pipe is connected with the water discharge port of the heat exchanger;

and the water seal device is connected with the drain pipe and comprises an alkaline part.

29. The water heater according to claim 28, wherein said water seal further comprises:

the outer barrel is connected with the drain pipe and comprises a first pipe body and a second pipe body, the second pipe body is located on the periphery of the first pipe body, one end of the first pipe body is communicated with the drain pipe, and the other end of the first pipe body is communicated with the second pipe body;

the inner barrel, at least a part of said inner barrel stretches into said second tube, enclose the first flow path between inner wall of said inner barrel and the outer wall of said first tube, enclose the second flow path between inner wall of said second tube and the outer wall of said inner barrel, said first flow path connects said first tube and said second flow path.

30. The water heater of claim 29,

the inner barrel is provided with a guide hole and a stopping part, the guide hole is communicated with the second flow channel, the guide hole is positioned between the stopping part and the other end of the first pipe body, and the stopping part is abutted against the inner wall of the second pipe body;

the water seal device further comprises a sealing part, and the sealing part is used for sealing the joint of the stopping part and the second pipe body.

31. The water heater as recited in any one of claims 24 to 27, further comprising:

the control device is connected with the liquid level detection device of the heat exchanger;

the alarm device is connected with the control device, and the control device is configured to control the alarm device to work according to a detection signal of the liquid level detection device;

the display device is connected with the control device, and the control device is configured to control the display device to work according to the detection signal of the liquid level detection device.