CN216924737U - Water heater - Google Patents
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- CN216924737U CN216924737U CN202220006313.8U CN202220006313U CN216924737U CN 216924737 U CN216924737 U CN 216924737U CN 202220006313 U CN202220006313 U CN 202220006313U CN 216924737 U CN216924737 U CN 216924737U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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Abstract
The present application relates to a water heater. Provided is a water heater including: a fan; one end of the premixer is connected to the air inlet side of the fan; the air inlet pipe is connected to one end of the premixer, which is far away from the fan; the gas inlet pipe is communicated with the convergence area of the premixer; the first wind pressure detection device is arranged on one side of the air inlet pipe close to the premixer; the second wind pressure detection device is arranged on the gas inlet pipe; the wind pressure switch is respectively connected with the first wind pressure detection device and the second wind pressure detection device; wherein the wind pressure switch is configured to be in an off state when a difference between detection results of the first wind pressure detecting device and the second wind pressure detecting device is lower than a preset threshold value. The wind pressure switch can be enabled to better detect various blocking conditions of the water heater, so that the monitoring precision of the blocking prevention of the water heater is improved.
Description
Technical Field
The application relates to the technical field of water heaters, in particular to a water heater.
Background
The wind pressure switch is communicated with the pressure taking nozzle of the fan through the silicone tube, a certain negative pressure is generated to enable the wind pressure value at the wind pressure switch to reach the action value of the wind pressure switch, the wind pressure switch can be in an actuation state, and the gas water heater can normally work at the moment.
However, in the conventional technology, most of the fully premixed water heaters perform wind pressure detection on the air inlet side of the fan, and the wind pressure detection structure is not perfect to a certain extent, so that the problem of low reliability of wind pressure detection exists.
SUMMERY OF THE UTILITY MODEL
Therefore, the water heater is needed to be provided aiming at the problem that the wind pressure detection reliability of the traditional full-premix water heater is not high.
According to an aspect of the present application, there is provided a water heater including:
a fan;
one end of the premixer is connected to the air inlet side of the fan; the premixer has a convergent region that converges toward its central axis; the radial dimension of the convergence zone is less than the radial dimension of both ends of the premixer;
the air inlet pipe is connected to one end, far away from the fan, of the premixer;
the gas inlet pipe is communicated with the convergence area of the premixer;
the first wind pressure detection device is arranged on one side, close to the premixer, of the air inlet pipe;
the second wind pressure detection device is arranged on the gas inlet pipe; and
the wind pressure switches are respectively connected with the first wind pressure detection device and the second wind pressure detection device; wherein the wind pressure switch is configured to be in an off state when a difference between detection results of the first wind pressure detecting device and the second wind pressure detecting device is lower than a preset threshold value.
In one embodiment, the wind pressure switch includes a positive pressure port connected to the first wind pressure detecting device, and a negative pressure port connected to the second wind pressure detecting device.
In one embodiment, the water heater comprises two wind pressure switches;
and the preset threshold values corresponding to the two wind pressure switches are different.
In one embodiment, the wind pressure detecting device further comprises a first connecting pipe respectively connected with the first wind pressure detecting device and a positive pressure taking port of one of the wind pressure switches;
the first connecting pipe is provided with a second connecting pipe connected with a positive pressure taking port of the other wind pressure switch;
and a first three-way connector is arranged between the first connecting pipe and the second connecting pipe.
In one embodiment, the wind pressure detecting device further comprises a third connecting pipe respectively connected to the second wind pressure detecting device and a negative pressure taking port of one of the wind pressure switches;
a fourth connecting pipe connected with a negative pressure taking port of the other wind pressure switch is arranged on the third connecting pipe;
and a second three-way connector is arranged between the third connecting pipe and the fourth connecting pipe.
In one embodiment, the radial dimension of the premixer is gradually reduced and then gradually increased from the end of the premixer far away from the fan to the end near the fan.
In one embodiment, the end of the premixer away from the fan has a radial dimension D;
the minimum radial dimension of the convergence zone of the premixer is d;
wherein, D: d is 1.5-2.5: 1.
in one embodiment, the wind pressure switch further comprises a controller electrically connected to the wind pressure switch and the fan respectively.
In one embodiment, the gas control device further comprises a gas valve which is arranged in the gas inlet pipe and electrically connected to the controller.
In one embodiment, the air conditioner further comprises an igniter which is arranged on the air outlet side of the fan and electrically connected to the controller.
In the above water heater, the wind pressure switch is configured to be in an off state when the difference between the detection results of the first wind pressure detection device and the second wind pressure detection device is lower than a preset threshold, it can be understood that the wind pressure switch can obtain the difference between the detection results of the first wind pressure detection device and the second wind pressure detection device, the difference between the detection results is the pressure difference between the end of the premixer far away from the fan and the convergence area of the premixer, because the radial dimension of the convergence area of the premixer is smaller than the radial dimension of the end of the premixer far away from the fan, the pressure difference is proportional to the fluid flow passing through the premixer according to the venturi effect, and the fluid flow passing through the premixer is reduced no matter whether the air inlet pipe of the water heater is blocked or the air filter is blocked or the burner is blocked or the smoke exhaust pipe is blocked, the pressure difference is correspondingly reduced, and when the difference is lower than the preset threshold, the wind pressure switch is in an off state so that the water heater stops working and reports faults. In the water heater of each embodiment of the utility model, the first wind pressure detection device is arranged on one side of the air inlet pipe close to the premixer, and the second wind pressure detection device is arranged on the gas inlet pipe and is installed in a matched manner, so that the wind pressure switch can better detect various blocking conditions of the water heater, and the anti-blocking monitoring precision of the water heater is improved.
Drawings
FIG. 1 shows a schematic structural diagram of a water heater in an embodiment of the present application;
fig. 2 shows a flow chart of a control method of a water heater in an embodiment of the present application.
In the figure: 10. a water heater; 110. a fan; 120. a premixer; 121. a convergence zone; 130. an air inlet pipe; 131. an air filter; 140. a gas inlet pipe; 141. a gas valve; 151. a first wind pressure detecting device; 152. a second wind pressure detecting device; 153. a wind pressure switch; 1531. a positive pressure tapping; 1532. a negative pressure port; 1541. a first connecting pipe; 1542. a second connecting pipe; 1543. a third connecting pipe; 1544. a fourth connecting pipe; 155. a first three-way connector; 156. a second three-way connector; 160. a burner; 161. an igniter; 162. a flame feedback needle; 170. a controller; 180. a display.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The wind pressure switch is communicated with the pressure taking nozzle of the fan through the silicone tube, a certain negative pressure is generated to enable the wind pressure value at the wind pressure switch to reach the action value of the wind pressure switch, the wind pressure switch can be in an actuation state, and the gas water heater can normally work at the moment.
However, in the conventional technology, most of the fully premixed water heaters perform wind pressure detection on the air inlet side of the fan, and the wind pressure detection structure is not perfect to a certain extent, so that the problem of low reliability of wind pressure detection exists.
The inventor of this application discovers through the research that there is not high reason of wind pressure detection reliability in the wind pressure detection of traditional full premix water heater: on the one hand, the full premix water heater of traditional art mostly adopts the single tube of wind pressure switch to carry out the wind pressure and detects, so can not play fine protective effect to the jam of air cleaner, the pipe of discharging fume or combustor of water heater. On the other hand, the air inlet of the fan is generally a straight channel, and the caliber of the fan is not changed, so that if the smoke exhaust pipe of the water heater or the air filter or the burner is blocked, the influence of the smoke exhaust pipe or the air filter or the burner on the pressure difference change at the air inlet of the fan is not large, and the air pressure switch arranged at the air inlet of the fan is difficult to make corresponding response to various blocking conditions of the water heater.
Fig. 1 shows a schematic structural diagram of a water heater 10 in an embodiment of the present application.
In some embodiments, optionally referring to fig. 1, a water heater 10 provided in an embodiment of the present application includes a fan 110, a premixer 120, an air inlet pipe 130, a gas inlet pipe 140, a first wind pressure detecting device 151, a second wind pressure detecting device 152, and a wind pressure switch 153.
One end of the premixer 120 is connected to the air inlet side of the blower 110, the premixer 120 has a converging region 121 that converges toward the central axis thereof, and the radial dimension of the converging region 121 is smaller than the radial dimension of both ends of the premixer 120. The air inlet pipe 130 is connected to an end of the premixer 120 away from the blower 110, and the gas inlet pipe 140 is communicated with the convergence region 121 of the premixer 120, so that after the blower 110 is operated, the air in the air inlet pipe 130 and the gas in the gas inlet pipe 140 can be premixed in the premixer 120, and the premixed air and gas can be combusted at the burner 160 of the water heater 10.
The first wind pressure detecting device 151 is disposed at one side of the air inlet pipe 130 close to the premixer 120, the second wind pressure detecting device 152 is disposed at the gas inlet pipe 140, and the wind pressure switches 153 are respectively connected to the first wind pressure detecting device 151 and the second wind pressure detecting device 152. Then, the wind pressure switch 153 communicates with the end of the premixer 120 away from the fan 110 and the convergence area of the premixer 120, respectively.
The wind pressure switch 153 is configured to be in an off state when a difference between detection results of the first wind pressure detecting device 151 and the second wind pressure detecting device 152 is lower than a preset threshold, it can be understood that the wind pressure switch 153 can obtain a difference between detection results of the first wind pressure detecting device and the second wind pressure detecting device, the difference is a pressure difference between one end of the premixer 120 away from the fan 110 and a convergence area of the premixer 120, the radial dimension of the convergence area of the premixer 120 is smaller than that of one end of the premixer 120 away from the fan 110, the pressure difference is proportional to a fluid flow rate through the premixer 120 according to a venturi effect, the fluid flow rate through the premixer 120 is decreased whether the air inlet pipe 130 or the air filter, or the burner 160 or the smoke exhaust pipe is blocked, the pressure difference is correspondingly decreased, and when the difference is lower than the preset threshold, the wind pressure switch 153 is in the off state, so that the water heater 10 stops operating and reports a fault. So the water heater of this application, set up first wind pressure detection device 151 in air intake pipe 130 and be close to premixer 120 one side, second wind pressure detection device 152 sets up in gas intake pipe 140, and it is mutually supported the installation to make wind pressure switch 153 can detect the multiple jam condition of water heater better, prevent the control precision of jam with the improvement water heater.
In some embodiments, optionally, the wind pressure switch 153 includes a positive pressure-taking port 1531 connected to the first wind pressure detecting device 151, and a negative pressure-taking port 1532 connected to the second wind pressure detecting device 152. Then, the positive pressure-taking port 1531 of the wind pressure switch 153 communicates with the end of the premixer 120 away from the fan 110, and the negative pressure-taking port 1532 of the wind pressure switch 153 communicates with the convergence region 121 of the premixer 120. That is, the pressure difference between the positive pressure-taking port 1531 and the negative pressure-taking port 1532 of the wind pressure switch 153 is the pressure difference between the end of the premixer 120 away from the fan 110 and the convergence region of the inlet and the premixer 120, so that the wind pressure switch 153 can be in the off state when the difference between the detection results of the first wind pressure detecting device 151 and the second wind pressure detecting device 152 is below the preset threshold value.
In some embodiments, optionally, the water heater 10 includes two wind pressure switches 153, and the preset thresholds of the two wind pressure switches 153 are different. Then, the positive pressure ports 1531 of the two wind pressure switches 153 are both connected to the end of the premixer 120 away from the fan 110, and the negative pressure ports 1532 of the two wind pressure switches 153 are both connected to the convergence region 121 of the premixer 120.
The preset threshold value corresponding to one of the wind pressure switches 153 is smaller, and the whole working process of the water heater 10 can be monitored by using the wind pressure switch 153; the other wind pressure switch 153 has a larger preset threshold value, and the wind pressure switch 153 can be used for monitoring the blockage of the air flow passage of the water heater 10 under the rated load before the igniter 161 is ignited.
For convenience of illustration, the two wind pressure switches 153 are a first wind pressure switch and a second wind pressure switch, respectively, the first wind pressure switch has a first preset threshold value, the second wind pressure switch has a second preset threshold value, and the first preset threshold value is greater than the second preset threshold value.
When the air intake of the air inlet of the air intake pipe 130 is small, the pressure difference between the positive pressure taking port 1531 and the negative pressure taking port 1532 of the second air pressure switch can also be higher than the second preset threshold value, the second air pressure switch is in a closed state, the situation that the suction force is small and the traditional air pressure sensor cannot reach the action value due to the small air intake can not occur, and the whole process of the water heater 10 working can be monitored by using the second air pressure switch.
Referring to fig. 2, after the fan 110 is started, when the air filter 131 in the air intake pipe 130 is blocked, and the pressure difference between the positive pressure-taking port 1531 and the negative pressure-taking port 1532 of the second wind pressure switch decreases to be lower than the second preset threshold, and/or the pressure difference between the positive pressure-taking port 1531 and the negative pressure-taking port 1532 of the first wind pressure switch decreases to be lower than the first preset threshold, the first wind pressure switch and/or the second wind pressure switch is in an open state, so that the controller 170 can issue an instruction to stop the operation of the water heater 10, and the wind pressure switch is not in a closed state and will not be opened due to the blockage of the air filter 131 (the wind pressure detection structure of the conventional water heater is still in a closed state when the negative pressure on the downstream side of the air filter 131 of the air intake increases).
Referring to fig. 2, after the fan 110 is started, if the first wind pressure switch and the second wind pressure switch are both in a closed state, it is indicated that the pressure difference between the positive pressure-taking port 1531 and the negative pressure-taking port 1532 of the first wind pressure switch is greater than a first preset threshold value, and the pressure difference between the positive pressure-taking port 1531 and the negative pressure-taking port 1532 of the second wind pressure switch is greater than a second preset threshold value, which indicates that the air duct of the fan 110 is normal, so that the burner 160 of the water heater 10 can be started to ignite, and specifically, the igniter 161 of the burner 160 is started to ignite.
Therefore, the set wind pressure switch 153 can accurately determine the variation of the wind volume during the operation of the water heater 10, and the two wind pressure switches 153 can also be used to monitor the overall operation process of the water heater 10.
In some embodiments, optionally, the water heater 10 further includes a first connection pipe 1541 connected to the first wind pressure detecting device 151 and the positive pressure-taking port 1531 of one of the wind pressure switches 153, respectively, a second connection pipe 1542 connected to the positive pressure-taking port 1531 of the other wind pressure switch 153 is disposed on the first connection pipe 1541, and a first three-way connector 155 is disposed between the first connection pipe 1541 and the second connection pipe 1542. Thus, the positive pressure-taking ports 1531 of the two wind pressure switches 153 are respectively communicated with the first wind pressure detecting device 151 by means of the first three-way connector 155, that is, the positive pressure-taking ports 1531 of the two wind pressure switches 153 can be respectively communicated with the air intake duct 130, so that the wind pressure switches 153 acquire the pressure value of the end of the premixer 120 away from the fan 110.
In some embodiments, optionally, the water heater 10 further includes a third connecting pipe 1543 connected to the second wind pressure detecting device 152 and the negative pressure taking port 1532 of one of the wind pressure switches 153, respectively, a fourth connecting pipe 1544 connected to the negative pressure taking port 1532 of another wind pressure switch 153 is disposed on the third connecting pipe 1543, and a second three-way connector 156 is disposed between the third connecting pipe 1543 and the fourth connecting pipe 1544. Similarly, the negative pressure-taking ports 1532 of the two wind pressure switches 153 are respectively communicated with the second wind pressure detecting device 152 by the second three-way connector 156, that is, the negative pressure-taking ports 1532 of the two wind pressure switches 153 can be respectively communicated with the gas inlet pipe 140, so that the wind pressure switches 153 can obtain the pressure value of the convergence region 121 of the premixer 120, and further obtain the pressure difference between the end of the premixer 120 away from the fan 110 and the inlet and the convergence region 121 of the premixer 120.
In some embodiments, referring to fig. 1, the radial dimension of the premixer 120 may be gradually decreased and then gradually increased from the end of the premixer 120 away from the fan 110 to the end near the fan 110. The convergent area 121 is located between an end of the premixer 120 far from the fan 110 and an end of the premixer 120 near the fan 110, and the radial dimension of the premixer 120 is gradually changed, which is more beneficial to obtain the pressure difference between the first wind pressure detecting device 151 and the second wind pressure detecting device 152.
In some embodiments, optionally, the converging section 121 is located in the middle of the premixer 120, and the gas inlet conduit 140 communicates with the portion of the converging section 121 of the premixer 120 where the radial dimension is smallest. The pressure difference between the positive pressure-taking port 1531 and the negative pressure-taking port 1532 of the wind pressure switch 153 can be made to be larger, and correspondingly, when the wind speed of the air flow channel of the water heater 10 changes, the change value of the pressure difference between the positive pressure-taking port 1531 and the negative pressure-taking port 1532 of the wind pressure switch 153 is also larger, so that the wind pressure switch can better detect various blockage conditions of the water heater, and the monitoring precision of the blockage prevention of the water heater is improved.
In some embodiments, optionally, referring to fig. 1, a radial dimension of an end of the premixer 120 away from the fan 110 is D, and a minimum radial dimension of the convergence zone 121 of the premixer 120 is D, where D: d is 1.5-2.5: 1.
preferably, D: d is 1.7: 1, the whole working process of the water heater 10 can be better monitored by the wind pressure switch 153, and the wind pressure detection reliability is higher.
In some embodiments, optionally, a controller 170 electrically connected to the wind pressure switch 153 and the fan 110 is further included. The controller 170 is configured to send a corresponding control instruction according to the state of the wind pressure switch 153 before or after the fan 110 is started.
Specifically, when the controller 170 acquires a closing instruction of the wind pressure switch 153 before the fan 110 is started, the control instruction includes an instruction to cause the display 180 of the water heater 10 to display that the water heater 10 is in a failure state, and an instruction to stop the operation of the water heater 10.
When the controller 170 obtains an off command of the wind pressure switch 153 before the fan 110 is started, the control command includes a command to continue the operation of the water heater 10.
Specifically, in the embodiment shown in fig. 2, before the fan 110 is started, if the first wind pressure switch and the second wind pressure switch are both in the off state, it indicates that the first wind pressure switch and the second wind pressure switch are in the normal state, and the fan 110 can be started. If the first wind pressure switch or the second wind pressure switch is in a closed state, it indicates that the first wind pressure switch and/or the second wind pressure switch is in a fault, and the water heater 10 can stop working to perform corresponding maintenance.
In some embodiments, the water heater 10 further comprises a gas valve 141 disposed in the gas inlet pipe 140 and electrically connected to the controller 170, so that the gas valve 141 is opened or closed under the control of the controller 170 according to the state of the wind pressure switch 153.
In some embodiments, referring to fig. 1, optionally, the water heater 10 further includes an igniter 161 disposed at the air outlet side of the fan 110 and electrically connected to the controller 170.
Referring to fig. 2, after the fan 110 is started, if the first wind pressure switch and the second wind pressure switch are both in the closed state, the igniter 161 of the water heater 10 is controlled to start ignition.
After the burner 160 of the water heater 10 starts ignition, if the controller 170 does not obtain the flame feedback signal of the flame feedback needle 162, the gas valve 141 is closed, and it can be further determined whether the igniter 161 fails to ignite.
Referring to fig. 2, after the ignition of the water heater 10 is started, if the controller 170 obtains the flame feedback signal of the flame feedback pin 162 and the second wind pressure switch is in the closed state, it indicates that the burner 160 is burning normally.
Referring to fig. 2, after the ignition of the water heater 10 is started, if the controller 170 obtains the flame feedback signal of the flame feedback needle 162 and the second wind pressure switch is in the off state, it indicates that there is a high possibility of a blockage fault in the water heater 10, the gas valve 141 may be closed, and the water heater 10 may be stopped to perform corresponding maintenance.
In some embodiments, an air filter 131 is optionally disposed in the air inlet pipe 130, and the air filter 131 can filter the air entering the fan 110 to prevent the fan 110 and the burner 160 from being clogged.
In some embodiments, referring to fig. 2, before the igniter 161 starts ignition, when the air flow path of the air inlet pipe 130 is blocked, if the pressure difference between the positive pressure port 1531 and the negative pressure port 1532 of the first wind pressure switch is lower than a first preset threshold value and the first wind pressure switch is in an off state, it indicates that the machine full load is reduced to 30% due to the blockage, and the ignition is not allowed, so that the water heater 10 can be stopped for maintenance.
In some embodiments, referring to fig. 2, after the igniter 161 starts ignition, if the fan 110 is set to the minimum rotation speed and the air flow path of the air inlet pipe 130 is blocked, if the pressure difference between the positive pressure taking port 1531 and the negative pressure taking port 1532 of the second wind pressure switch is lower than the second preset threshold value and the second wind pressure switch is in the off state, it indicates that the minimum load of the machine is reduced to 15% due to the blockage, the controller 170 will issue an instruction to close the gas valve 141 and stop the operation of the water heater 10, and may also prevent the occurrence of a backfire risk due to too low working load of the water heater 10.
In a word, the first preset threshold of the first wind pressure switch is larger, the first wind pressure switch is used for judging the blocking condition of the air flow channel of the water heater 10 under the rated load before the water heater is started to ignite, and if the wind pressure value of the air flow channel is lower than the first preset threshold, ignition is not allowed; the second wind pressure switch is used for monitoring the whole working process of the water heater 10, and when the wind pressure value of the air flow channel is too low, the safe shutdown can be realized.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A water heater, comprising:
a fan (110);
a premixer (120) with one end connected to the air inlet side of the fan (110);
an air inlet pipe (130) connected to one end of the premixer (120) far away from the fan (110); the premixer (120) has a converging region (121) approaching toward its central axis; the radial dimension of the convergence zone (121) is smaller than the radial dimension of both ends of the premixer (120);
a gas inlet pipe (140) communicating with the convergent zone (121) of the premixer (120);
a first wind pressure detecting device (151) disposed on a side of the air intake pipe (130) close to the premixer (120);
the second wind pressure detection device (152) is arranged on the gas inlet pipe (140); and
a wind pressure switch (153) connected to the first wind pressure detecting device (151) and the second wind pressure detecting device (152), respectively;
wherein the wind pressure switch (153) is configured to be in an off state when a difference between detection results of the first wind pressure detecting device (151) and the second wind pressure detecting device (152) is below a preset threshold value.
2. The water heater according to claim 1, wherein the wind pressure switch (153) comprises a positive pressure tap (1531) connected to the first wind pressure detecting device (151), and a negative pressure tap (1532) connected to the second wind pressure detecting device (152).
3. A water heater according to claim 1 or 2, characterized in that the water heater (10) comprises two said wind pressure switches (153);
the preset threshold values corresponding to the two wind pressure switches (153) are different.
4. The water heater according to claim 3, further comprising a first connection pipe (1541) connected to the first wind pressure detecting device (151) and the positive pressure taking port (1531) of one of the wind pressure switches (153), respectively;
the first connecting pipe (1541) is provided with a second connecting pipe (1542) connected with a positive pressure taking port (1531) of another wind pressure switch (153);
a first three-way connector (155) is arranged between the first connecting pipe (1541) and the second connecting pipe (1542).
5. The water heater according to claim 4, further comprising a third connecting pipe (1543) connected to the second wind pressure detecting device (152) and the negative pressure taking port (1532) of one of the wind pressure switches (153), respectively;
a fourth connecting pipe (1544) connected to the negative pressure taking port (1532) of the other wind pressure switch (153) is arranged on the third connecting pipe (1543);
a second three-way connector (156) is arranged between the third connecting pipe (1543) and the fourth connecting pipe (1544).
6. The water heater of claim 1, wherein the radial dimension of the premixer (120) tapers from the end of the premixer (120) distal from the fan (110) to the end proximal to the fan (110).
7. The water heater according to claim 6, wherein the end of the premixer (120) distal from the fan (110) has a radial dimension D;
-the minimum radial dimension of the convergence zone (121) of the premixer (120) is d;
wherein, D: d is 1.5-2.5: 1.
8. the water heater of claim 1, further comprising a controller (170) electrically connected to the wind pressure switch (153) and the fan (110), respectively.
9. The water heater according to claim 8, further comprising a gas valve (141) disposed in the gas inlet pipe (140) and electrically connected to the controller (170).
10. The water heater of claim 9, further comprising an igniter (161) disposed on the air outlet side of the fan (110) and electrically connected to the controller (170).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220006313.8U CN216924737U (en) | 2022-01-04 | 2022-01-04 | Water heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220006313.8U CN216924737U (en) | 2022-01-04 | 2022-01-04 | Water heater |
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| CN216924737U true CN216924737U (en) | 2022-07-08 |
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| CN202220006313.8U Active CN216924737U (en) | 2022-01-04 | 2022-01-04 | Water heater |
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2022
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