CN212987624U - Constant-temperature water supply system - Google Patents
Constant-temperature water supply system Download PDFInfo
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- CN212987624U CN212987624U CN202020913083.4U CN202020913083U CN212987624U CN 212987624 U CN212987624 U CN 212987624U CN 202020913083 U CN202020913083 U CN 202020913083U CN 212987624 U CN212987624 U CN 212987624U
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Abstract
The utility model relates to a constant temperature water supply system, which comprises a gas water heater and a water tank; a water outlet pipe; the outer barrel is provided with a first through hole, a second through hole and a third through hole which are in fluid communication with the cavity, the first through hole is in fluid communication with the water outlet pipe, the second through hole is in fluid communication with the water inlet of the water tank, the third through hole is in fluid communication with the water outlet end of the heat exchange pipe, and the water outlet of the water tank is in fluid communication with the water outlet pipe; the inner barrel is provided with a first opening, a second opening and a third opening which are in fluid communication with the inner cavity, the first opening can be in fluid communication with the first through hole, the second opening can be in fluid communication with the second through hole, and the third through hole and the third opening are in fluid communication all the time; the driving mechanism is in driving connection with the inner barrel, so that the first opening at least partially corresponds to the first through hole and/or the second opening at least partially corresponds to the second through hole, water temperature fluctuation is buffered, and hot water can be rapidly generated.
Description
Technical Field
The utility model belongs to the technical field of gas heater, concretely relates to constant temperature water supply system.
Background
With the continuous improvement of the living standard of people, the pursuit of the bath comfort is higher and higher. The gas water heater has high heating speed and large water volume, becomes a preferred water heater type for many users, but the gas water heater also has the inherent problems of large water temperature fluctuation when the water pressure is unstable, large water temperature fluctuation when the water is turned off and then turned on in the water using process, no heat when the gas water heater is burnt in winter, hot water in summer and the like.
In order to solve the problems, some water heaters adjust the water flow by a water adding servo regulating valve, but the simple water adding servo valve has higher cost and unobvious effect; some manufacturers add a water storage tank at the water outlet end of a water heater to keep the water outlet temperature constant, as shown in "a constant temperature type gas water heater" disclosed in the chinese utility model patent with the patent number CN201621370960.8 (with the publication number CN206269353U), but the water storage tank is simple, and the hot water outlet time of the water heater can be reduced due to more cold water in the water storage tank.
As shown in another patent application, CN201710368998.4 (publication No. CN107192118A), which discloses an instant heating device for a water heater and a control method thereof, the instant heating device for a water heater includes a preheating water tank containing an electric heating device, a water inlet of the preheating water tank is connected with a water outlet pipe of the water heater through a water inlet pipe, a water outlet of the preheating water tank is connected with a water consumption point through a water outlet pipe, the water inlet pipe and the water outlet pipe of the water heater are respectively connected to two ends of a temperature control valve, a third end of the temperature control valve is connected with the water outlet pipe through a water outlet branch pipe, the temperature control valve includes a valve body, a valve cavity with three valve ports is arranged in the valve body, the three valve ports are respectively an inlet connected with the water outlet pipe of the water heater, a first through hole connected with the water inlet of the preheating water tank and a second through hole connected with the water outlet branch pipe, a first pipe end enclosure for, and a second pipeline end enclosure for opening or sealing the second through hole is arranged on one side of the second through hole, and the opening and sealing states of the first pipeline end enclosure and the second pipeline end enclosure are opposite.
The control method of the instant heating device for the water heater comprises the following steps:
(1) the electric heating device is electrified to work, and water in the preheating water tank is heated to a set temperature;
(2) when the temperature of water flowing out of the water outlet pipe of the water heater is greater than or equal to a set temperature, the first through hole is blocked by the first pipeline sealing head, the second through hole is opened by the second pipeline sealing head, and the water outlet pipe of the water heater is communicated with the water outlet pipe through the temperature control valve and is used for supplying hot water to a water using point; when the temperature of water flowing out of the water heater water outlet pipe is lower than a set temperature, the first through hole is opened by the first pipeline sealing head, the second through hole is sealed by the second pipeline sealing head, the water heater water outlet pipe is communicated with the preheating water tank through the temperature control valve and enters the preheating water tank, and hot water in the preheating water tank is used for supplying hot water for water using points through the water outlet pipe.
However, the water heater has the following defects: 1. when the temperature of water flowing out of the water outlet pipe of the water heater is greater than or equal to the set temperature, the water outlet pipe of the water heater is directly communicated with the water outlet pipe through the temperature control valve, namely, hot water directly flows out, but the water heater cannot be adjusted in summer if the water temperature is too high; 2. the water heater mainly aims at solving the problem of zero cold water and focuses on realizing instant heating and opening, but when the temperature of outlet water is higher than a set temperature, even if water temperature fluctuation occurs, the adjustment cannot be carried out, so the water heater has limited capacity of buffering the water temperature fluctuation; 3. the water in the water tank of the water heater is electrically heated, and the problem of matching of electric heating capacity and temperature fluctuation of the gas water heater exists, for example, after hot water in the electric water heater is replaced by cold water in a pipeline at the beginning, the cold water in the electric water heater is not yet heated, the temperature of the water discharged by the gas water heater is lower than a set temperature, and the cold water is discharged; in addition, when the outlet water temperature of the gas water heater is lower than the set temperature, the constant temperature water in the water tank can be used firstly, so that the ideal conditions are required to be met: the temperature in the water tank is always equal to the set temperature; 4. the first through hole and the second through hole of the water heater can only be completely opened or closed, water flow cannot be adjusted, and then water flow temperature cannot be adjusted to adapt to use in summer or winter; 5. when the water heater operates under low load in summer, condensed water is easily generated at the heat exchange tube.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to the current situation of prior art, a can cushion the undulant constant temperature water supply system of temperature is provided.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a constant temperature water supply system comprises
The gas water heater is provided with a heat exchange pipe;
the water tank is positioned at the downstream of the gas water heater along the water flow direction;
the water outlet pipe is positioned at the downstream of the gas water heater along the water flow direction;
the outer barrel is internally provided with a cavity, the outer barrel is provided with a first through hole, a second through hole and a third through hole which are in fluid communication with the cavity, the first through hole is in fluid communication with the water outlet pipe, the second through hole is in fluid communication with the water inlet of the water tank, the third through hole is in fluid communication with the water outlet end of the heat exchange pipe, and the water outlet of the water tank is in fluid communication with the water outlet pipe;
it is characterized by also comprising
The inner cylinder is coaxial with the outer cylinder and can be movably arranged in the cavity, the inner cylinder is provided with an inner cavity, a first opening, a second opening and a third opening which are communicated with the inner cavity in a fluid mode are formed in the inner cylinder, the first opening can be communicated with the first through hole in the fluid mode, the second opening can be communicated with the second through hole in the fluid mode, and the third through hole and the third opening are communicated with each other in the fluid mode all the time;
and the driving mechanism is in driving connection with the inner barrel and is used for driving the inner barrel to generate position change relative to the outer barrel, so that the first opening at least partially corresponds to the first through hole and/or the second opening at least partially corresponds to the second through hole.
In order to adjust the water flow and enable the water heater to reach the set water temperature when working in summer or winter, the first opening and the first through hole are kept in a staggered state, the inner barrel can move relative to the outer barrel to change the corresponding coincidence area of the second opening and the second through hole, namely, the opening of the second through hole is changed, the water heater is used in winter, the water inlet temperature of tap water is low, when the temperature set by a user is high, the water heater cannot be heated to the target temperature, the first temperature sensor detects a signal and feeds the signal back to the electric controller, the electric controller controls the servo motor to drive the inner barrel to move, the opening of the second through hole is properly reduced until the outlet water temperature reaches the set temperature, and similarly, the opening of the second through hole is opened when the water heater is used in summer.
Because the water heater is easy to produce condensed water in the operation of low load in summer, the temperature of water inflow is low in winter, the water temperature in the heat exchanger is overhigh, the water boiling noise is easy to generate, the outer barrel is provided with a fourth through hole for communicating the cavity of the outer barrel with the position of the heat exchange tube close to the water inlet end, the inner barrel is provided with a fourth opening communicated with the inner cavity of the inner barrel in a fluid mode, the fourth opening is communicated with the fourth through hole in a corresponding mode in the state that the second opening is communicated with the second through hole in a corresponding mode, and the opening change trend of the fourth through hole is consistent with the opening change trend of the second through hole. In summer, the inlet water temperature is high, the second through hole is opened to the maximum, the fourth opening and the fourth through hole are correspondingly communicated, namely the bypass water flow is adjusted to be large, so that the water temperature in the heat exchanger is high, condensed water is difficult to generate, and the service life of the heat exchanger is prolonged; the water inlet temperature is low during operation in winter, the opening degree of the second through hole is reduced, the opening degree of the fourth through hole is also reduced, the flow of the bypass water is reduced at the moment, and otherwise, the water temperature in the heat exchanger is too high to generate water boiling noise.
In order to improve the thermal efficiency, the fourth opening and the fourth through hole are staggered in a state that the first opening and the first through hole are correspondingly communicated. Therefore, the bypass waterway is closed when the first through hole is opened in the initial stage, so that the heating speed can be increased, water can be rapidly heated, and the heat efficiency is improved; in addition, the bypass pipe can reduce the water stop temperature rise.
In order to facilitate the adjustment of the opening degree of the fourth through hole, the inner cylinder can be rotatably arranged in the outer cylinder, the fourth through hole is circular, and the longitudinal section of the fourth opening is gradually reduced along the circumferential direction of the inner cylinder. When the fourth opening is staggered with the fourth through hole, the fourth through hole is completely closed, and when the fourth opening is partially aligned with the fourth through hole, the opening of the fourth through hole is changed along with the rotation of the inner cylinder because the overlapping area of the fourth opening and the fourth through hole is changed.
The inner cylinder can generate position change relative to the outer cylinder through various moving modes, and the inner cylinder can be axially movably arranged in the outer cylinder.
The driving mechanism can have various structural forms, and preferably comprises a motor and a screw rod in driving connection with the motor, wherein the screw rod extends along the axial direction of the inner barrel, and the screw rod penetrates through the end wall of the inner barrel and is in threaded connection with the inner barrel.
The inner cylinder generates position change relative to the outer cylinder in another moving mode, and the inner cylinder can be rotatably arranged in the outer cylinder.
In order to carry out spacingly to the turned angle of inner tube, the spacing groove has been seted up along its circumference on the periphery wall of inner tube, be equipped with on the internal perisporium of urceolus and restrict in the spacing groove and can be along the spacing lug that the spacing groove removed.
Compared with the prior art, the utility model has the advantages that: 1. the water tank is in fluid communication with the water outlet end of the heat exchange tube of the water heater, and can play a role in buffering water temperature fluctuation; 2. and the first opening can correspond to the first through hole at least locally, the second opening can correspond to the second through hole at least locally, so the utility model discloses when the water heater is initially opened, if the difference of setting for the temperature of water and temperature of water in the water tank is in setting for the within range, say that the temperature of water in the water tank is lower, open the first through hole, close the second through hole, directly make water flow out from the outlet pipe, because the heating rate of gas heater is very fast, so hot water can be fast produced and flow out, open instant heating; if the difference value between the water temperature in the water tank and the set water temperature is not in the set range, the second through hole is opened and the first through hole is closed, so that the water in the water heater flows out after passing through the water tank, and the water in the water heater flows out from the water outlet pipe after being buffered by the water tank, so that the water can be buffered by the water tank to achieve the constant temperature effect no matter the water is cold water or hot water; 3. the second through hole communicated with the water tank can be partially or completely opened, so that the water flow can be adjusted by adjusting the opening degree of the second through hole; when the water heater is used in winter, the temperature of inlet water of tap water is low, and when the temperature is set to be high by a user, the water heater cannot be heated to a target temperature, the first temperature sensor detects a signal and feeds the signal back to the electric controller, the electric controller controls the driving mechanism to drive the inner barrel, the opening degree of the second through hole is properly reduced until the temperature of outlet water reaches a set temperature, and similarly, the opening degree of the second through hole is increased when the water heater is used in summer.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of the inner and outer barrels of FIG. 1 (first through-hole open, second through-hole closed);
FIG. 3 is a cross-sectional view of the inner and outer barrels of FIG. 1 (the first through-holes are gradually closed and the second through-holes are gradually opened);
FIG. 4 is a cross-sectional view of the inner and outer barrels of FIG. 1 (the first through-hole is closed and the second through-hole is open);
FIG. 5 is a sectional view of the inner and outer cylinders of FIG. 1 (the first through hole is closed, and the opening of the second through hole is adjusted);
FIG. 6 is a flow chart of the control method of FIG. 1;
fig. 7 is a schematic structural view of embodiment 2 of the present invention;
FIG. 8 is a schematic structural view of the inner cylinder, the outer cylinder and the driving mechanism in FIG. 7;
FIG. 9 is a schematic structural view of the inner barrel of FIG. 7;
FIG. 10 is a schematic structural view of the outer tub of FIG. 7;
FIG. 11 is an exploded view of FIG. 8;
fig. 12 is a cross-sectional view of fig. 8 (first through-hole open, second through-hole, fourth through-hole closed);
FIG. 13 is a cross-sectional view of FIG. 8 (second through-hole open, first through-hole closed);
fig. 14 is a sectional view of fig. 8 (the first through hole is closed, and the opening degree of the second through hole is adjusted);
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1
As shown in fig. 1 to 6, the constant temperature water supply system of the preferred embodiment includes a gas water heater 1, a water tank 2, a water outlet pipe 3, an outer cylinder 4, an inner cylinder 5 and a driving mechanism 6, the gas water heater 1 has a heat exchange pipe 11, the water tank 2 is provided with a heat insulation layer 23 for heat insulation of water in the water tank 2, and the outer cylinder 4, the inner cylinder 5, the water tank 2 and the water outlet pipe 3 are all located at the downstream of the gas water heater 1 along a water flow direction.
The cavity 40 is arranged in the outer barrel 4, the outer barrel 4 is provided with a first through hole 41, a second through hole 42 and a third through hole 43 which are in fluid communication with the cavity 40, the first through hole 41 is in fluid communication with the water outlet pipe 3, the second through hole 42 is in fluid communication with the water inlet 21 of the water tank 2, the third through hole 43 is in fluid communication with the water outlet end of the heat exchange pipe 11, and the water outlet 22 of the water tank 2 is in fluid communication with the water outlet pipe 3.
The inner cylinder 5 is arranged coaxially with the outer cylinder 4, and the inner cylinder 5 can move axially along the outer cylinder 4 under the drive of the drive mechanism 6, so that the outer diameter of the inner cylinder 5 can be matched with the inner diameter of the outer cylinder 4. In this embodiment, the driving mechanism 6 includes a motor and a screw 62 connected to the motor, the screw 62 extends along the axial direction of the inner cylinder 5, the screw 62 passes through the end wall of the inner cylinder 5 and is in threaded connection with the inner cylinder 5, the motor drives the screw 62 to rotate, and the inner cylinder 5 moves along the axial direction of the screw 62, so that the position change is generated relative to the outer cylinder 4.
The inner cylinder 5 is provided with an inner cavity 50, the inner cylinder 5 is provided with a first opening 51, a second opening 52 and a third opening 53 which are communicated with the inner cavity 50 in a fluid mode, the first opening 51 can be communicated with the first through hole 41 in a fluid mode, the second opening 52 can be communicated with the second through hole 42 in a fluid mode, the third through hole 43 is communicated with the third opening 53 in a fluid mode all the time, in the embodiment, the third through hole 43 is formed in the end wall of the outer cylinder 4, the third opening 53 is formed in the end wall of the inner cylinder 5, and therefore the third through hole 43 can be communicated with the third opening 53 no matter the inner cylinder 5 moves to any position in the axial direction.
As shown in fig. 2 to 5, the inner cylinder 5 has a plurality of matching modes with the outer cylinder 4 under the action of the driving mechanism 6: as shown in fig. 2, the first through hole 41 is open, and the second through hole 42 is closed; as shown in fig. 3, the first through hole 41 is gradually closed, and the second through hole 42 is gradually opened; as shown in fig. 4, the first through hole 41 is closed, and the second through hole 42 is opened; as shown in fig. 5, in a state where the first through hole 41 is closed, the opening degree of the second through hole 42 is adjusted by the axial movement of the inner cylinder 5.
The water supply system further comprises an electric controller 7, a first temperature sensor 81 is arranged on the water outlet pipe 3 and close to the water outlet end, a second temperature sensor 82 is arranged on the water tank 2 and close to the water outlet end, the first temperature sensor 81 and the second temperature sensor 82 are electrically connected with the input end of the electric controller 7, and the output end of the electric controller 7 is electrically connected with the proportional valve 91, the fan 92 and the driving mechanism 6.
As shown in fig. 6, the control method of the constant temperature water supply system of the present embodiment includes the steps of:
(1) setting a required water temperature t by a user;
(2) the electric controller 7 collects the information of the second temperature sensor 82 and judges whether the temperature t2 of the water in the water tank 2 is less than t and whether the difference between the two (t2 and t) is in a set range, if so, the step (3) is executed, and if not, the step (9) is executed; in the present embodiment, it is determined whether or not t-t2> -5 is satisfied;
(3) the electric controller 7 controls the driving mechanism 6 to work, so that the first through hole 41 is opened and the second through hole 42 is closed, and thus, water in the water heater directly enters the water outlet pipe 3 without passing through the water tank 2;
(4) the electric controller 7 controls the proportional valve 91 and the fan 92 to burn towards the set water temperature t;
(5) the electric controller 7 collects the information of the first temperature sensor 81 and judges whether the water temperature t1 in the water outlet pipe 3 reaches the set water temperature t, if so, the step (6) is executed, and if not, the step (4) is returned to be continuously executed;
(6) the electric controller 7 controls the driving mechanism 6 to work, slowly close the first through hole 41 and open the second through hole 42, at this time, hot water flowing out of the heat exchanger flows out partially from the first through hole 41, partially flows into the water tank 2 from the second through hole 42 and flows out of the water tank 2 after being mixed with cold water in the water tank 2, and then is mixed with water flowing out of the first through hole 41 in the water outlet pipe 3, in the process, due to the fact that the cold water in the water tank 2 is mixed, the water outlet temperature sensor can detect that the water temperature is lower than a set temperature, a signal is fed back to the electric controller 7, the electric controller 7 controls the proportional valve 91 and the fan 92 to properly increase the combustion load, and the water outlet temperature is ensured to be basically unchanged, namely;
(7) the electric controller 7 controls the proportional valve 91 and the fan 92 to burn towards the set water temperature t;
(8) the electric controller 7 collects the information of the second temperature sensor 82 and judges whether the water temperature t2 in the water tank 2 reaches the set water temperature t, if yes, the step (9) is executed, and if not, the step (7) is returned to be continuously executed;
(9) the electric controller 7 controls the driving mechanism 6 to work, so that the first through hole 41 is closed, the second through hole 42 is opened, all water flowing out of the water heater flows into the water outlet pipe 3 after passing through the water tank 2 at the moment, the water tank 2 plays a role in buffering water temperature fluctuation, and the water temperature flowing out of the water heater is too high or too low, so that the water temperature can be buffered through the water tank 2, and the water temperature flowing out of the water outlet pipe 3 is ensured to be constant. When the water pressure of a user is unstable, the water outlet temperature of the water heater is unstable due to reaction lag of the water heater, after the water tank 2 is added, when hot water flowing through the heat exchanger is hot, the hot water enters the water tank 2 and is neutralized by warm water in the water tank 2, so that the water outlet temperature is not hot to the user, and vice versa.
When the water heater works in summer, the water outlet temperature is overhigh even if the water heater is burnt under the minimum load; or when working in winter, even if the combustion is carried out under the maximum load, the water outlet temperature still does not reach the set temperature, so the embodiment can realize that: when the first opening 51 and the first through hole 41 are kept in a staggered state, namely the first through hole 41 is closed, the inner cylinder 5 can move relative to the outer cylinder 4 so as to change the corresponding overlapping area of the second opening 52 and the second through hole 42, namely the opening of the second through hole 42 is adjusted to adjust the water flow, when the water heater is used in winter, the water heater cannot be heated to a target temperature due to low inlet water temperature of tap water, when the temperature set by a user is high, the water heater cannot be heated to the target temperature, at the moment, the first temperature sensor 81 detects a signal and feeds the signal back to the electric controller 7, the electric controller 7 controls the servo motor to drive the inner cylinder 5 to move, the opening of the second through hole 42 is properly reduced until the outlet water temperature reaches the set temperature, and similarly, the opening of the second through.
In order to adjust the water flow to adapt to the operation of the water heater in summer or winter, the control method further comprises the following steps:
(10) in the state of the step (9), the electric controller 7 judges whether the water flow is set by the user, if so, the electric controller 7 controls the driving mechanism 6 to work, the opening degree of the second through hole 42 is adjusted to the set water flow, and then the step (11) is executed; if not, directly executing the step (11);
(11) the electric controller 7 collects the information of the second temperature sensor 82, compares the water temperature t2 in the water tank 2 with the set temperature t, and judges the operation load of the water heater:
(a) if the water heater is at the minimum load and the water temperature t2 in the water tank 2 is higher than the set temperature t, executing the step (12);
(b) when the water heater is in the maximum load and the temperature t2 of the water in the water tank 2 is less than the set temperature t, executing the step (13);
(c) if the water heater is not at the maximum load or the minimum load, executing the step (14);
(12) the electric controller 7 controls the driving mechanism 6 to work, the opening degree of the second through hole 42 is increased, and then the step (14) is executed;
(13) the electric controller 7 controls the driving mechanism 6 to work, the opening degree of the second through hole 42 is reduced, and then the step (14) is executed;
(14) the electric controller 7 collects the information of the first temperature sensor 81 and judges whether the water flow temperature t1 in the water outlet pipe 3 reaches the set water temperature t, if so, the water heater continues to keep outputting hot water with stable temperature; if not, executing the step (15);
(15) the electric controller 7 controls the proportional valve 91 and the blower 92 to burn toward the set water temperature t and then performs step (14).
The electric controller 7 can firstly judge whether the water heater is in minimum load combustion, if so, the water temperature t2 in the water tank 2 and the set temperature t are continuously compared; if not, judging whether the combustion is in the maximum load combustion, if so, continuously comparing the water temperature t2 in the water tank 2 with the set temperature t; of course, it is also possible to first determine whether or not combustion is at the maximum load and then determine whether or not combustion is at the minimum load.
The structure of the inner barrel 5 and the outer barrel 4 of the embodiment can be used for the gas water heater 1 capable of setting target outlet water flow, for example, a user is familiar with a 5L/min water flow hot water bath and sets the water flow on the water heater in advance, the water flow sensor detects a water flow signal and feeds the water flow signal back to the electric controller 7, and the electric controller 7 controls the servo motor to adjust the three-way adjusting valve to enable the outlet water flow to reach the target flow.
The water supply system of the present embodiment is restored to the initial state condition: after the user uses up a period of time (specific time is decided by reasons such as the heat preservation performance of the water tank 2, the temperature difference with the ambient temperature, etc.), when the second temperature sensor 82 at the water outlet of the water tank 2 detects that the water temperature in the water tank 2 is lower than the set temperature (for example, 6 ℃), the electric controller 7 controls the inner barrel 5 to reset, so that the first through hole is opened 41 and the second through hole 42 is closed.
Example 2
As shown in fig. 7 to 14, example 2 differs from example 1 in that:
1. in this embodiment, a bypass pipe 441 is provided, a fourth through hole 44 communicating with the chamber 40 of the outer cylinder 4 is provided, the fourth through hole 44 is in fluid communication with a portion of the heat exchange pipe 11 near the water inlet end through the bypass pipe 441, and a fourth opening 54 in fluid communication with the inner cavity 50 of the inner cylinder 5 is provided.
In a state that the first opening 51 is correspondingly communicated with the first through hole 41, the fourth opening 54 is staggered with the fourth through hole 44, in other words, the bypass waterway is closed when the first through hole 41 is opened in the initial stage, so that the heating speed can be increased, water can be rapidly heated, and the heat efficiency is improved; in addition, the bypass pipe 441 is arranged to reduce the water-stop temperature rise.
In a state that the second opening 52 and the second through hole 42 are correspondingly communicated, the fourth opening 54 and the fourth through hole 44 are correspondingly communicated, and the opening degree variation trend of the fourth through hole 44 is consistent with the opening degree variation trend of the second through hole 42, in other words, when the opening degree of the second through hole 42 is maximum, the opening degree of the fourth through hole 44 is also maximum, and at this time, the water flow rate in the bypass pipe 441 is maximum; when the opening degree of the second through hole 42 is minimum, the opening degree of the fourth through hole 44 is also minimum, and at this time, the flow rate of water in the bypass pipe 441 is minimum. In this embodiment, when the second through hole 42 is completely opened (i.e. when the first through hole 41 is completely closed), the inner cylinder 5 continues to rotate to open the fourth through hole 44, and when the second through hole 42 is completely opened, the fourth through hole 44 is also completely opened.
In this embodiment, the fourth through hole 44 is circular, the longitudinal cross section (cross section along the axial direction of the inner cylinder 5) of the fourth opening 54 gradually decreases along the circumferential direction of the inner cylinder 5, the fourth through hole 44 is completely closed when the fourth opening 54 is displaced from the fourth through hole 44, and the opening degree of the fourth through hole 44 changes as the overlapping area of the fourth opening 54 and the fourth through hole 44 changes with the rotation of the inner cylinder 5 when the fourth opening 54 partially corresponds to the fourth through hole 44.
Because the water heater is easy to produce the condensate water in summer due to low load operation, and the water inlet temperature is low in winter, the water temperature in the heat exchanger is too high to produce water boiling noise, the bypass pipe 441 can solve the problems: in summer, the inlet water temperature is high, the second through hole 42 is opened to the maximum, and the fourth opening 54 and the fourth through hole 44 are correspondingly communicated at the moment, namely the bypass water flow is adjusted to be large, so that the water temperature in the heat exchanger is high, the condensed water is difficult to generate, and the service life of the heat exchanger is prolonged; during operation in winter, the inlet water temperature is low, the opening degree of the second through hole 42 is reduced, the opening degree of the fourth through hole 44 is reduced, the flow of the bypass water is reduced at the moment, and otherwise, water boiling noise is easily generated due to overhigh water temperature in the heat exchanger.
2. The operation mode of the inner cylinder 5 is different from that of embodiment 1: in this embodiment, the inner cylinder 5 is rotatably disposed in the outer cylinder 4 along its axis, and the inner cylinder 5 is rotated in a circumferential direction by the driving mechanism 6 to control opening and closing of the first through hole 41 and opening and closing of the second through hole 42. As shown in fig. 12, the first opening 51 corresponds to the first through hole 41, the first through hole 41 is open, and both the second through hole 42 and the fourth through hole 44 are closed; as shown in fig. 13, the second opening 52 corresponds to the second through hole 42, the second through hole 42 is opened, the first opening 52 is staggered from the first through hole 41, and the first through hole 41 is closed; as shown in fig. 14, in a state where the first through hole 41 is closed, the inner cylinder 5 is rotated to adjust the opening degree of the second through hole 42.
As shown in fig. 9 and 10, the outer peripheral wall of the inner cylinder 5 is provided with a limit groove 45 along the circumferential direction thereof, and the inner peripheral wall of the outer cylinder 4 is provided with a limit projection 55 which is restrained in the limit groove 45 and can move along the limit groove 45, so as to limit the rotation angle of the inner cylinder 5. The driving mechanism 6 is a motor, and the output end of the driving mechanism is directly connected with the inner cylinder 5 in a driving way.
3. The driving mechanism 6 of the embodiment is a servo motor, the top of the outer cylinder 4 is covered with a valve cover 45, and the output end of the motor passes through the valve cover 45 to be connected with the inner cylinder 5 in a driving way; a seal ring 46 is provided between the outer cylinder 4 and the inner cylinder 5.
The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion or/and be transported to the second portion, and may be directly communicated between the first portion and the second portion, or indirectly communicated between the first portion and the second portion via at least one third member, which may be a fluid passage such as a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber allowing the fluid to flow therethrough, or a combination thereof.
Claims (8)
1. A constant temperature water supply system comprises
The gas water heater (1) is provided with a heat exchange pipe (11);
the water tank (2) is positioned at the downstream of the gas water heater (1) along the water flow direction;
the water outlet pipe (3) is positioned at the downstream of the gas water heater (1) along the water flow direction;
the heat exchanger comprises an outer barrel (4), a cavity (40) is arranged in the outer barrel (4), a first through hole (41), a second through hole (42) and a third through hole (43) which are communicated with the cavity (40) in a fluid mode are formed in the outer barrel (4), the first through hole (41) is communicated with a water outlet pipe (3) in the fluid mode, the second through hole (42) is communicated with a water inlet (21) of a water tank (2) in the fluid mode, the third through hole (43) is communicated with a water outlet end of a heat exchange pipe (11) in the fluid mode, and a water outlet (22) of the water tank (2) is communicated with the water outlet pipe (3) in the fluid;
it is characterized by also comprising
The inner cylinder (5) and the outer cylinder (4) are coaxial and can be movably arranged in the cavity (40), the inner cylinder (5) is provided with an inner cavity (50), a first opening (51), a second opening (52) and a third opening (53) which are communicated with the inner cavity (50) in a fluid mode are formed in the inner cylinder (5), the first opening (51) can be communicated with the first through hole (41) in a fluid mode, the second opening (52) can be communicated with the second through hole (42) in a fluid mode, and the third through hole (43) and the third opening (53) are communicated with each other in a fluid mode all the time;
and the driving mechanism (6) is in driving connection with the inner cylinder (5) and is used for driving the inner cylinder (5) to generate position change relative to the outer cylinder (4), so that the first opening (51) at least partially corresponds to the first through hole (41) and/or the second opening (52) at least partially corresponds to the second through hole (42).
2. The constant temperature water supply system according to claim 1, wherein: the inner cylinder (5) is movable relative to the outer cylinder (4) to vary the corresponding overlapping area of the second opening (52) and the second through hole (42) while the first opening (51) and the first through hole (41) are maintained in a staggered state.
3. The constant temperature water supply system according to claim 1, wherein: the outer cylinder (4) is provided with a fourth through hole (44) which is used for communicating a cavity (40) of the outer cylinder with a position, close to a water inlet end, of the heat exchange tube (11), the inner cylinder (5) is provided with a fourth opening (54) which is in fluid communication with an inner cavity (50) of the inner cylinder, the fourth opening (54) is in corresponding communication with the fourth through hole (44) under the condition that the second opening (52) is in corresponding communication with the second through hole (42), and the opening change trend of the fourth through hole (44) is consistent with the opening change trend of the second through hole (42).
4. The constant temperature water supply system according to claim 3, wherein: the fourth opening (54) and the fourth through hole (44) are offset in a state where the first opening (51) and the first through hole (41) are in communication with each other.
5. The constant temperature water supply system according to claim 3, wherein: the inner cylinder (5) can be rotatably arranged in the outer cylinder (4), the fourth through hole (44) is circular, and the longitudinal section of the fourth opening (54) is gradually reduced along the circumferential direction of the inner cylinder (5).
6. A constant temperature water supply system according to any one of claims 1 to 4, wherein: the inner cylinder (5) is axially movably arranged in the outer cylinder (4).
7. The constant temperature water supply system according to claim 6, wherein: the driving mechanism (6) comprises a motor (61) and a screw rod (62) connected with the motor (61) in a driving mode, the screw rod (62) extends along the axial direction of the inner barrel (5), and the screw rod (62) penetrates through the end wall of the inner barrel (5) and is in threaded connection with the inner barrel (5).
8. A constant temperature water supply system according to any one of claims 1 to 4, wherein: the utility model discloses a spacing structure of urceolus (4) is including urceolus (5), inner tube (5) can locate urceolus (4) with rotating, spacing groove (45) have been seted up along its circumference on the periphery wall of inner tube (5), be equipped with on the internal perisporium of urceolus (4) and restrict spacing lug (55) in spacing groove (45) and can remove along spacing groove (45).
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|---|---|---|---|
| CN202020913083.4U CN212987624U (en) | 2020-05-26 | 2020-05-26 | Constant-temperature water supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020913083.4U CN212987624U (en) | 2020-05-26 | 2020-05-26 | Constant-temperature water supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883715A (en) * | 2021-09-06 | 2022-01-04 | 孙永军 | Cold-hot mixed type constant-temperature gas water heater and control method thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883715A (en) * | 2021-09-06 | 2022-01-04 | 孙永军 | Cold-hot mixed type constant-temperature gas water heater and control method thereof |
| CN113883715B (en) * | 2021-09-06 | 2023-09-05 | 广东四季福燃气具有限公司 | Cold and hot mixed constant temperature gas water heater and control method thereof |
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