CN116951770A

CN116951770A - Combined water heater

Info

Publication number: CN116951770A
Application number: CN202210410838.2A
Authority: CN
Inventors: 赵婷; 范汇武; 顾春鹏; 王龙强; 毕三宝
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2023-10-27

Abstract

The application provides a combined water heater, which comprises a gas heater, a water tank, an electric heater and a temperature sensor. The gas heater is used for controllably heating water flowing therethrough. The water inlet of the water tank is connected with the water outlet pipe of the gas heater to receive water from the gas heater, and the water outlet of the water tank is used for supplying water in the water tank outwards. The electric heater is arranged in the water tank and is used for heating water in the water tank in a controlled manner. The temperature sensor is used for detecting the water temperature in the water tank. The gas heater is further configured to be activated when a water flow rate through the gas heater is greater than a preset activation flow rate threshold and a temperature difference between a set temperature of the combination water heater and a water temperature within the water tank is greater than a first threshold. The electric heater is further configured to be started when the temperature difference between the set temperature of the combined water heater and the water temperature in the water tank is greater than a second threshold value; wherein the first threshold is greater than the second threshold. This solves the problems of long heating time of the heater and unstable water temperature.

Description

Combined water heater

Technical Field

The application relates to the field of water heaters, in particular to a combined water heater.

Background

When the electric water heater heats water from low temperature to high temperature, the time is longer, and when the demand of hot water is larger, the state of supply shortage often occurs, which leads to longer waiting time of users. The time required for the gas water heater to heat the water from the low temperature to the high temperature is short, but when the gas water heater is restarted, the gas water heater starts to ignite after 3 to 5 seconds after starting because the ignition needs to wait for cleaning before the fan. This can cause a user to first flow hot water stored in the water pipe and then cold water for 3 to 5 seconds after starting the gas water heater, resulting in a poor user experience.

Disclosure of Invention

An object of the present application is to provide a combined water heater for solving the above-mentioned problems.

In particular, the present application provides a combination water heater comprising:

a gas heater for controllably heating the flowing water;

the water inlet of the water tank is connected with the water outlet pipe of the gas heater so as to receive water from the gas heater, and the water outlet of the water tank is used for supplying water in the water tank outwards;

the electric heater is arranged in the water tank and used for heating water in the water tank in a controlled manner;

the temperature sensor is used for detecting the water temperature in the water tank; and, in addition, the processing unit,

the gas heater is also configured to: starting when the water flow flowing through the gas heater is larger than a preset starting flow threshold value and the temperature difference between the set temperature of the combined water heater and the water temperature in the water tank is larger than a first threshold value;

the electric heater is further configured to: starting when the temperature difference between the set temperature of the combined water heater and the water temperature in the water tank is larger than a second threshold value; wherein the first threshold is greater than the second threshold.

Optionally, the combined water heater further comprises:

the flow sensor is arranged on the water inlet pipe of the gas heater and used for detecting the water flow flowing through the gas heater.

Optionally, the gas heater is further configured for load-bearing combustion.

Optionally, the gas heater comprises:

a combustion chamber for combusting a fuel gas therein to heat water flowing therethrough;

the fuel gas pipeline is used for conveying fuel gas to the combustion chamber;

the fuel gas on-off valve is arranged on the fuel gas pipeline and is configured to control on-off of the fuel gas pipeline.

Optionally, the gas heater further comprises:

the two ends of the heating pipe are respectively connected with the water inlet pipe and the water outlet pipe;

and the heat exchanger is arranged in the combustion chamber and is used for arranging the heating pipe thereon to heat the heating pipe.

Optionally, the gas heater further comprises:

a fan configured to deliver air into the combustion chamber at a fixed wind speed to combust the gas.

Optionally, the gas heater further comprises:

the fume collecting hood is covered above the combustion chamber and extends upwards to form a fume exhaust pipeline for exhausting fume from the combustion chamber.

Optionally, the gas heater is further configured to: and closing when the temperature difference between the set temperature of the combined water heater and the water temperature in the water tank is smaller than a first threshold value.

Optionally, the gas heater is further configured to: and closing when the water flow rate flowing through the gas heater is smaller than a preset starting flow rate threshold value.

Alternatively, the first threshold is 3.5 ℃ to 6.5 ℃ and the second threshold is 0.5 ℃ to 2 ℃.

The application provides a combined water heater, which comprises a gas heater, a water tank, an electric heater and a temperature sensor. The gas heater is used for controllably heating water flowing therethrough. The water inlet of the water tank is connected with the water outlet pipe of the gas heater to receive water from the gas heater, and the water outlet of the water tank is used for supplying water in the water tank outwards. The electric heater is arranged in the water tank and is used for heating water in the water tank in a controlled manner. The temperature sensor is used for detecting the water temperature in the water tank. The gas heater is further configured to be activated when a water flow rate through the gas heater is greater than a preset activation flow rate threshold and a temperature difference between a set temperature of the combination water heater and a water temperature within the water tank is greater than a first threshold. The electric heater is further configured to be started when the temperature difference between the set temperature of the combined water heater and the water temperature in the water tank is greater than a second threshold value; wherein the first threshold is greater than the second threshold. The outlet pipe of gas heater is connected with the water inlet of water tank, and this avoids gas heater start 3 seconds to 5 seconds in cold water direct flow to user, causes bad experience to the user. The gas heater is started when the water flow flowing through the gas heater is larger than a preset starting flow threshold value and the temperature difference between the set temperature of the combined water heater and the water temperature in the water tank is larger than a first threshold value, so that the technical problem that the heating time of the electric heater is long can be solved. When the temperature difference between the set temperature and the water temperature in the water tank is larger than a first threshold value, the water temperature in the water tank is proved to be lower, the electric heater can not heat the water in the water tank to the set temperature under the current water inlet speed and the current water outlet speed of the water tank, and at the moment, cold water entering the water tank needs to be preheated by the gas heater to ensure the water temperature in the water tank.

The above, as well as additional objectives, advantages, and features of the present application will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present application when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the application will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

FIG. 1 is a schematic view of a combination water heater according to one embodiment of the present application;

FIG. 2 is a schematic diagram of a gas heater in a combination water heater according to one embodiment of the application;

FIG. 3 is a cross-sectional view of a gas heater according to one embodiment of the application;

FIG. 4 is a flow chart of operation of a combination water heater according to one embodiment of the application.

Detailed Description

FIG. 1 is a schematic view of a combination water heater according to one embodiment of the present application; FIG. 2 is a schematic diagram of a gas heater in a combination water heater according to one embodiment of the application; FIG. 3 is a cross-sectional view of a gas heater according to one embodiment of the application; FIG. 4 is a flow chart of operation of a combination water heater according to one embodiment of the application.

As shown in fig. 1 to 4, the present embodiment provides a combination water heater 10, and the combination water heater 10 includes a gas heater 100, a water tank 200, an electric heater 300, and a temperature sensor 400. The gas heater 100 is used to controllably heat the flowing water. The water inlet 210 of the water tank 200 is connected to the water outlet pipe 110 of the gas heater 100 to receive water from the gas heater 100, and the water outlet 220 thereof is used to supply water in the water tank 200 to the outside. The electric heater 300 is disposed in the water tank 200, and the electric heater 300 is used to controllably heat water in the water tank 200. The temperature sensor 400 is used to detect the water temperature in the water tank 200. The gas heater 100 is also configured to be activated when the water flow rate through the gas heater 100 is greater than a preset activation flow rate threshold and the temperature difference between the set temperature of the combination water heater 10 and the water temperature within the tank 200 is greater than a first threshold. The electric heater 300 is further configured to be activated when the temperature difference between the set temperature of the combination water heater 10 and the water temperature in the water tank 200 is greater than a second threshold; wherein the first threshold is greater than the second threshold.

In the present embodiment, the specific configuration of the gas heater 100 is not limited, and it can be used to controllably heat water flowing therethrough. For example, the gas heater 100 may use a gas heater as in the prior art, or a constant load gas heater may be used. The constant load gas heater means that the gas heater 100 burns at constant load, that is, the heat released by the gas heater 100 per unit time is the same, or the mass of the gas consumed per unit time is understood to be the same. In the present embodiment, the gas heater 100 can supply hot water into the water tank 200 and timely supplement the hot water into the water tank 200, so that the water temperature in the water tank 200 can reach a preset temperature in a short time. Therefore, in the present embodiment, the specific configuration of the gas heater 100 is not limited, and it is sufficient that the water flowing therethrough can be heated in a controlled manner to timely replenish the hot water into the water tank 200.

In the present embodiment, the shape and size of the water tank 200 are not limited, and it is sufficient that it can be used to store hot water. The water tank 200 is provided with a water inlet 210, and the water tank 200 obtains hot water from the gas heater 100 through the water inlet 210 and supplements the hot water to the water tank 200 in time. The water tank 200 obtains hot water from the gas heater 100, the electric heater 300 heats the hot water in the water tank 200 to a set temperature, not from cold water to the set temperature, the heating time of the electric heater 300 is shortened, and the supply amount of the hot water is ensured. The opening position of the water inlet 210 on the water tank 200 is not limited, and for example, the water inlet 210 may be opened at the top, middle or bottom of the water tank 200. The shape and size of the water inlet 210 are not limited, and for example, the shape of the water inlet 210 may be circular, square or other irregular shape, and the water inlet 210 may be connected to the water outlet pipe 110 to obtain hot water from the inside of the gas heater 100.

The specific type of the electric heater 300 is not limited, and it may be capable of controllably heating the water in the water tank 200. For example, the electric heater 300 may employ resistance wire heating or employ infrared heating, etc. As a specific example, as shown in fig. 1, the electric heater 300 is heated by an electric heating rod. The electric heater 300 is disposed in the water tank 200 to ensure the stability of the water temperature of the combination water heater 10. The specific type of the temperature sensor 400 is not limited, and it can be used to detect the water temperature in the water tank 200. For example, the temperature sensor 400 may be a contact type temperature sensor or a non-contact type temperature sensor, and the temperature sensor 400 may be a thermal resistance type temperature sensor or a thermocouple type temperature sensor.

In this embodiment, the specific value of the start flow rate threshold is not limited, and the start flow rate threshold at least ensures that water flowing through the gas heater 100 is not burned. The activation flow rate threshold is related to the power of the gas heater 100, and the larger the power of the gas heater 100, the larger the value of the activation flow rate threshold.

When the temperature difference between the set temperature and the water temperature in the water tank 200 is greater than the first threshold, it is proved that the water temperature in the water tank 200 is low, and the electric heater 300 cannot heat the water in the water tank 200 to the set temperature at the current water inlet speed and water outlet speed of the water tank 200, the cold water entering the water tank 200 needs to be preheated by the gas heater 100 to ensure the water temperature in the water tank 200. In the present embodiment, the specific value of the first threshold is not limited, and the first threshold is related to the power of the electric heater 300, and the larger the power of the electric heater 300 is, the larger the value of the first threshold is.

In summary, the water outlet pipe 110 of the gas heater 100 is connected to the water inlet 210 of the water tank 200, which prevents cold water within 3 to 5 seconds of starting up the gas heater 100 from directly flowing to the user, which causes bad experience to the user. When the water flow rate flowing through the gas heater 100 is greater than the preset start-up flow rate threshold and the temperature difference between the set temperature of the combination water heater 10 and the water temperature in the water tank 200 is greater than the first threshold, the gas heater 100 is started up, which can solve the technical problem of long heating time of the electric heater 300. When the temperature difference between the set temperature and the water temperature in the water tank 200 is greater than the first threshold value, it is verified that the water temperature in the water tank 200 has been relatively low. At the current water inlet and outlet speeds of the water tank 200, the electric heater 300 cannot heat the water in the water tank 200 to a set temperature, and the cold water entering the water tank 200 needs to be preheated by the gas heater 100 to ensure the water temperature in the water tank 200.

In other embodiments, the combination water heater 10 further includes a flow sensor 500, the flow sensor 500 being disposed on the inlet tube 120 of the gas heater 100, the flow sensor 500 being configured to detect the flow of water through the gas heater 100. The flow sensor 500 is disposed on the water inlet pipe 120 such that the flow sensor 500 is in a low-temperature working environment, water in the water inlet pipe 120 is not vaporized due to heating, etc., and the flow sensor 500 is disposed on the water inlet pipe 120 such that the flow sensor 500 can accurately detect water flow entering the gas heater 100, so as to accurately determine whether the water flow flowing through the gas heater 100 is greater than a preset starting flow threshold.

In other embodiments, the gas heater 100 is also configured for fixed-load combustion. The constant load combustion means that the amount of heat released by the gas heater 100 per unit time is the same, or it is understood that the mass of gas consumed per unit time is the same. In the present embodiment, the gas heater 100 is used to supply hot water into the water tank 200 and to supplement the hot water into the water tank 200 in time so that the water in the water tank 200 reaches a preset temperature in a short time. Therefore, in the present embodiment, the gas heater 100 is also configured to perform the fixed-load combustion, which makes the heating efficiency of the gas heater 100 high, the structure simple, the control logic simple, and the heating time controllable.

In other embodiments, the gas heater 100 includes a combustion chamber 130, a gas line 140, and a gas on-off valve 150. The combustion chamber 130 serves to burn fuel gas therein to heat water flowing therethrough. The gas line 140 is used to deliver gas to the combustion chamber 130. The gas on-off valve 150 is disposed on the gas pipeline 140 and configured to control on-off of the gas pipeline 140. In the present embodiment, the shape, size, material, etc. of the combustion chamber 130 are not limited, and the combustion chamber can burn the fuel gas therein to release heat. The gas line 140 communicates with the combustion chamber 130 to flow the gas therein into the combustion chamber 130. The specific shape, size, etc. of the gas line 140 are not limited, and it is sufficient that the gas can flow therethrough to the combustion chamber 130. The specific location where the gas line 140 communicates with the combustion chamber 130 is not limited, for example, the gas line 140 communicates with the combustion chamber 130 from the bottom of the combustion chamber 130 and the gas line 140 communicates with the combustion chamber 130 from the middle of the combustion chamber 130. The specific structure of the gas on-off valve 150 is not limited, and it is sufficient to switch the gas line 140 between on and off, that is, to switch the gas line 140 between supplying the gas to the combustion chamber 130 and stopping the gas line 140 from supplying the gas to the combustion chamber 130. The gas heater 100 has the advantages of high heating efficiency, simple structure, simple control logic and controllable heating time.

In other embodiments, the gas heater 100 further includes a heating pipe 160 and a heat exchanger 170, and both ends of the heating pipe 160 are connected to the water inlet pipe 120 and the water outlet pipe 110, respectively. In the present embodiment, the water inlet pipe 120, the heating pipe 160, and the water outlet pipe 110 are sequentially connected. In this embodiment, the water inlet pipe 120, the heating pipe 160 and the water outlet pipe 110 may be integrally formed or segmented. As a specific example, as shown in fig. 1, the water inlet pipe 120, the heating pipe 160 and the water outlet pipe 110 are integrally formed. A heat exchanger 170 is provided in the combustion chamber 130 for having the heating pipe 160 provided thereon to heat the heating pipe 160. The heating pipe 160 is disposed on the heat exchanger 170, so that heat exchange efficiency can be improved.

In other embodiments, the gas heater 100 further comprises a fan 180, the fan 180 configured to deliver air into the combustion chamber 130 at a fixed wind speed to combust the gas. The fan 180 employs a constant speed fan to make the control logic of the gas heater 100 relatively simple.

In other embodiments, the gas heater 100 further comprises a fume collecting hood 190, wherein the fume collecting hood 190 covers the upper part of the combustion chamber 130, and a fume exhaust pipeline 191 for exhausting fume from the combustion chamber 130 extends upwards. The fume collecting hood 190 is used for collecting and concentrating the fume in the combustion chamber 130 and exhausting the fume from the fume exhaust pipeline 191, so as to avoid the influence of the fume leakage on the environment. The smoke is naturally flowing upwards, and the smoke collecting cover 190 is arranged above the combustion chamber 130, so that the smoke collecting cover 190 is beneficial to collecting and concentrating the smoke in the combustion chamber 130 and exhausting the smoke from the combustion chamber 130.

In other embodiments, the gas heater 100 is further configured to shut off when the temperature difference between the set temperature of the combination water heater 10 and the water temperature within the tank 200 is less than a first threshold. This can prevent the water temperature in the water tank 200 from exceeding the set temperature, which is advantageous in ensuring that the water temperature in the water tank 200 does not exceed the set temperature. For example, although the temperature of the hot water output from the gas heater 100 is 100 ℃ while the temperature of the hot water is set to 40 ℃ in the water tank 200, if the temperature difference is smaller than the first threshold value, the gas heater 100 continuously inputs hot water into the water tank 200, which easily causes the temperature of the water in the water tank 200 to exceed the set temperature.

In other embodiments, the gas heater 100 is further configured to shut off when the water flow through the gas heater 100 is less than a preset activation flow threshold. When the water flow rate is less than the preset start-up flow rate threshold, the water flowing through the gas heater 100 is easily burned out, so that the gas heater 100 is burned out.

In other embodiments, the first threshold is 3.5 ℃ to 6.5 ℃ and the second threshold is 0.5 ℃ to 2 ℃.

The working process of the combined water heater 10 includes:

s402: acquiring the temperature of water in the water tank 200 and the set temperature of the combined water heater 10;

s404: if the temperature difference between the set temperature and the temperature of the water in the water tank 200 is greater than the second threshold value, controlling the electric heater 300 to be started;

s406: if the temperature difference between the set temperature and the temperature of the water in the water tank 200 is less than the second threshold value, the electric heater 300 is maintained to be turned off;

s408: acquiring the water flow rate flowing through the gas heater 100;

s410: if the water flow rate flowing through the gas heater 100 is greater than the starting flow rate threshold value, and if the temperature difference between the set temperature and the water temperature in the water tank 200 is greater than the first threshold value, controlling the gas heater 100 to start;

s412: if the water flow rate flowing through the gas heater 100 is less than the start-up flow rate threshold, and if the temperature difference between the set temperature and the water temperature in the water tank 200 is less than the first threshold, maintaining the gas heater 100 closed;

s414: and returns to the execution step to acquire the temperature of the water in the water tank 200 and the set temperature of the combination water heater 10.

In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include at least one such feature, i.e. one or more such features. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. When a feature "comprises or includes" a feature or some of its coverage, this indicates that other features are not excluded and may further include other features, unless expressly stated otherwise.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," "coupled," and the like should be construed broadly, as they may be fixed, removable, or integral, for example; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. Those of ordinary skill in the art will understand the specific meaning of the terms described above in the present application as the case may be.

Furthermore, in the description of the present embodiments, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature therebetween. That is, in the description of the present embodiment, the first feature being "above", "over" and "upper" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature "under", "beneath", or "under" a second feature may be a first feature directly under or diagonally under the second feature, or simply indicate that the first feature is less level than the second feature.

Unless otherwise defined, all terms (including technical and scientific terms) used in the description of this embodiment have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the description of the present embodiment, a description referring to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," 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 present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the application have been shown and described herein in detail, many other variations or modifications of the application consistent with the principles of the application may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the application. Accordingly, the scope of the present application should be understood and deemed to cover all such other variations or modifications.

Claims

1. A combination water heater comprising:

a gas heater for controllably heating the flowing water;

a temperature sensor for detecting the temperature of water in the water tank; and, in addition, the processing unit,

the gas heater is further configured to: starting when the water flow flowing through the gas heater is larger than a preset starting flow threshold value and the temperature difference between the set temperature of the combined water heater and the water temperature in the water tank is larger than a first threshold value;

2. The combination water heater as recited in claim 1, further comprising:

3. The combination water heater as claimed in claim 2, wherein,

the gas heater is also configured for fixed-load combustion.

4. A combination water heater as claimed in claim 3, wherein the gas heater comprises:

a gas line for delivering the gas to the combustion chamber;

the gas on-off valve is arranged on the gas pipeline and is configured to control on-off of the gas pipeline.

5. The combination water heater as recited in claim 4, wherein the gas heater further comprises:

and the heat exchanger is arranged in the combustion chamber and is used for enabling the heating pipe to be arranged on the heat exchanger so as to heat the heating pipe.

6. The combination water heater as recited in claim 4, wherein the gas heater further comprises:

7. The combination water heater as recited in claim 4, wherein the gas heater further comprises:

8. The combination water heater of claim 1, wherein the gas heater is further configured to: and closing when the temperature difference between the set temperature of the combined water heater and the water temperature in the water tank is smaller than the first threshold value.

9. The combination water heater of claim 1, wherein the gas heater is further configured to: and closing when the water flow flowing through the gas heater is smaller than the preset starting flow threshold value.

10. The combination water heater as claimed in claim 1, wherein,

the first threshold is 3.5 ℃ to 6.5 ℃ and the second threshold is 0.5 ℃ to 2 ℃.