Hot water equipment

Abstract

The present invention discloses a water heater, comprising: a main body, the main body having a combustion part, the combustion part generating heat by burning a mixture of a combustion-supporting gas and a combustible gas; a measuring unit for measuring the combustion-supporting gas, the measuring unit being arranged in the main body, and the measuring unit having a resistance element that changes with temperature; and a control unit, the control unit communicating with the measuring unit, the control unit controlling the intake amount of the combustible gas according to the measurement value of the measuring unit. The water heater according to the embodiment of the present invention has the advantages of good combustion effect, high heating efficiency, etc.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of a patent application with an application date of September 30, 2019, application number 201910943633.9, and a patent application name of “Hot Water Equipment”, as well as the priority of a patent application with an application date of September 30, 2019, application number 201921674133.1, and a patent application name of “Hot Water Equipment”. Technical Field

[0003] The invention relates to the technical field of electrical appliance manufacturing, and in particular to a water heating device. Background Art

[0004] In the related art, hot water equipment such as gas water heaters calculates the required amount of combustible gas according to the required water outlet temperature during operation, controls the fan current according to the combustible gas amount, and then controls the fan speed through the fan current, thereby controlling the air intake of the combustion-supporting gas, so as to adjust the ratio of the combustion-supporting gas to the combustible gas. However, the fan current is easily affected by the external environment and fluctuates, and the method of controlling the air intake of the combustion-supporting gas through the fan current has low accuracy, and it is difficult to accurately control the air intake of the combustion-supporting gas, so that it is difficult to accurately match the air and gas, which affects the combustion effect of the mixed gas of the combustion-supporting gas and the combustible gas, and affects the working performance of the hot water equipment. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a water heater having the advantages of good combustion effect and high heating efficiency.

[0006] To achieve the above-mentioned purpose, a water heating device is provided according to an embodiment of the present invention, which includes: a main body, the main body having a combustion part, the combustion part generating heat by burning a mixture of a combustion-supporting gas and a combustible gas; a measuring unit for measuring the combustion-supporting gas, the measuring unit being arranged in the main body, and the measuring unit having a resistance element that changes with temperature; and a control unit, the control unit communicating with the measuring unit, and the control unit controlling the intake amount of the combustible gas according to the measurement value of the measuring unit.

[0007] The water heating device according to the embodiment of the present invention has the advantages of good combustion effect and high heating efficiency.

[0008] In addition, the water heater according to the above embodiment of the present invention may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the water heater further comprises: an air supply component installed on the main body, the air supply component being used to transport combustion-supporting gas, the control unit being connected to the air supply component and being used to control the air supply volume of the air supply component.

[0010] According to some embodiments of the present invention, the measuring unit is disposed on the air supply component.

[0011] According to some embodiments of the present invention, the measuring unit is located at the air supply inlet of the air supply component or below the combustion part or at the combustion part air inlet of the combustion part.

[0012] According to some embodiments of the present invention, a combustion-supporting gas flow path is formed in the main body, and at least a portion of the measuring unit is disposed on the combustion-supporting gas flow path.

[0013] According to some embodiments of the present invention, the measuring unit is a thermistor.

[0014] According to some embodiments of the present invention, the control unit controls the intake amount of the combustible gas based on the change in the resistance value of the measuring unit under a constant current within a unit time.

[0015] According to some embodiments of the present invention, the measuring unit includes: an actual measurement unit and a comparison measurement unit matching the actual measurement unit, both the actual measurement unit and the comparison measurement unit communicate with the control unit, and the control unit controls the intake amount of the combustible gas based on the change in resistance value of the actual measurement unit compared with the comparison measurement unit per unit time.

[0016] According to some other embodiments of the present invention, the control unit controls the intake amount of the combustible gas based on how fast the resistance value of the measuring unit changes during a period when the first constant current decreases to the second constant current.

[0017] According to some embodiments of the present invention, the water heater further comprises a gas proportional valve for controlling the intake amount of the combustible gas, the gas proportional valve is arranged in the main body, and the gas proportional valve is electrically connected to the control unit.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1It is a partial structural schematic diagram of a water heating device according to an embodiment of the present invention.

[0021] Figure 2 It is a partial structural schematic diagram of a water heating device according to another embodiment of the present invention.

[0022] Figure 3 It is a partial structural schematic diagram of a water heating device according to another embodiment of the present invention.

[0023] Figure 4 It is a partial structural schematic diagram of a water heating device according to another embodiment of the present invention.

[0024] Figure 5 It is a partial structural schematic diagram of a water heating device according to another embodiment of the present invention.

[0025] Figure 6 It is a partial structural schematic diagram of a measuring unit of a water heating device according to another embodiment of the present invention.

[0026] Figure 7 is a relationship diagram between the gas volume and the air volume of a water heating device according to an embodiment of the present invention.

[0027] Figure 8 is a relationship diagram between the air volume and the rotation speed of a water heater according to an embodiment of the present invention.

[0028] Reference numerals: water heater 1 , main body 100 , combustion unit 110 , combustion unit air inlet 111 , measurement unit 200 , actual measurement unit 210 , comparison measurement unit 220 , air supply component 300 , air supply air inlet 310 . DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] The following describes a water heater 1 according to an embodiment of the present invention with reference to the accompanying drawings.

[0031] like Figure 1-Figure 8 As shown, the water heater 1 according to the embodiment of the present invention includes a body 100 , a measuring unit 200 and a control unit.

[0032] The main body 100 has a combustion part 110, and the combustion part 110 generates heat by burning a mixture of a combustion-supporting gas and a combustible gas. The measuring unit 200 is used to measure the combustion-supporting gas. The measuring unit 200 is arranged in the main body 100, and the measuring unit 200 has a resistance element that changes with temperature. The control unit communicates with the measuring unit 200, and the control unit controls the intake amount of the combustible gas according to the measurement value of the measuring unit 200.

[0033] The working process of the water heater 1 according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0034] When hot water needs to be prepared, the hot water equipment 1 calculates the theoretical intake volume of the combustible gas and the theoretical intake volume of the combustion-supporting gas through the control unit. Since the combustion-supporting gas will cool the resistance element when flowing through the measuring unit 200, causing the resistance value of the resistance element to change, the control unit calculates the actual intake volume of the combustion-supporting gas based on the detection value of the measuring unit 200, and then compares the actual intake volume of the combustion-supporting gas with the theoretical intake volume of the combustion-supporting gas, and then adjusts the actual intake volume of the combustion-supporting gas to achieve a suitable ratio between the combustible gas and the combustion-supporting gas.

[0035] According to the water heater 1 of the embodiment of the present invention, the measuring unit 200 and the control unit are provided so that the measuring unit 200 has the resistance element that changes with the temperature. In this way, the actual intake amount of the combustion-supporting gas flowing through the resistance element can be calculated by using the change in the resistance value of the resistance element, thereby accurately obtaining the proportional relationship between the amount of the combustible gas and the amount of the combustion-supporting gas.

[0036] Compared with the method of using fan current to control the air intake volume of combustion-supporting gas in related technologies, since the fan current is prone to fluctuations, the reliability of the method of judging the air intake volume of combustion-supporting gas by current value is poor. The water heating equipment 1 uses the measuring unit 200 to calculate the air intake volume of combustion-supporting gas, which can make the combustion-supporting gas and the combustible gas reach a suitable ratio, realize the full combustion and stable combustion of the mixed gas of the combustible gas and the combustion-supporting gas, facilitate the water heating equipment 1 to be in a good combustion condition, ensure the heating effect of the water heating equipment 1, improve the water output stability and reliability of the water heating equipment 1 in preparing hot water, and improve the user's comfort.

[0037] At the same time, the emission of harmful gases in the tail gas of the water heater 1 can be reduced, the environmental protection performance of the water heater 1 can be improved, the functionality and applicability of the water heater 1 can be improved, and the overall comprehensive performance of the water heater 1 can be improved.

[0038] Therefore, the water heater 1 according to the embodiment of the present invention has the advantages of good combustion effect and high heating efficiency.

[0039] The following describes a water heater 1 according to a specific embodiment of the present invention with reference to the accompanying drawings.

[0040] In some specific embodiments of the present invention, Figure 1-Figure 8 As shown, the water heater 1 according to the embodiment of the present invention includes a body 100 , a measuring unit 200 and a control unit.

[0041] Specifically, Figure 1 As shown, the water heater 1 further includes an air supply component 300, which is mounted on the main body 100 and is used to deliver the combustion-supporting gas. The control unit is connected to the air supply component 300 and is used to control the air supply volume of the air supply component 300. In this way, the control unit can control the working state of the air supply component 300 according to the detection value of the measuring unit 200, thereby controlling the air intake volume of the combustion-supporting gas, further facilitating the water heater 1 to obtain an accurate ratio of the combustion-supporting gas to the combustible gas, facilitating the water heater 1 to prepare hot water, and improving the working performance of the water heater 1.

[0042] More specifically, Figure 1 As shown, the measuring unit 200 is disposed on the air supply component 300. This facilitates the measuring unit 200 to measure the air volume of the combustion-supporting gas, and facilitates improving the measurement accuracy of the combustion-supporting gas flowing through the air supply component 300 by the measuring unit 200.

[0043] Furthermore, if Figure 1-Figure 5 As shown, the measuring unit 200 is located at the air supply inlet 310 of the air supply component 300 or below the combustion unit 110 or at the combustion unit air inlet 111 of the combustion unit 110 (the up and down direction is as shown in FIG. Figure 1-Figure 5 As shown by arrow A in FIG. 1 ). This facilitates the contact between the measuring unit 200 and the combustion-supporting gas, and further facilitates the measuring unit 200 to measure the air intake volume of the combustion-supporting gas, thereby improving the measurement accuracy and reliability of the measuring unit 200 for the air intake volume of the combustion-supporting gas.

[0044] Of course, the measuring unit 200 may also be located at the air outlet of the air supply component 300 .

[0045] Specifically, the water heater 1 further includes a smoke exhaust component, and the measuring unit 200 is disposed in the smoke exhaust component.

[0046] Optionally, a combustion-supporting gas flow path is formed in the main body 100, and at least a portion of the measuring unit 200 is disposed on the combustion-supporting gas flow path. This facilitates the measuring unit 200 to measure the combustion-supporting gas on the combustion-supporting gas flow path, and further facilitates the calculation of the actual air intake volume of the combustion-supporting gas using the detection value of the measuring unit 200.

[0047] Furthermore, there are multiple measuring units 200 arranged at intervals, and at least a portion of each measuring unit 200 is arranged on the combustion-supporting gas flow path. In this way, multiple measuring units 200 can be used to measure the combustion-supporting gas, which is convenient for improving the measurement accuracy and stability of the measuring units 200.

[0048] According to a specific embodiment of the present invention, the measuring unit 200 is disposed on the combustion-supporting gas flow path at a position close to the combustion part 110. Further, the measuring unit 200 is disposed at the air inlet of the combustion part 110.

[0049] It should be understood here that the "air inlet of the combustion unit 110" refers to the air inlet of the mixed gas of the combustible gas and the combustion-supporting gas.

[0050] Specifically, the measuring unit 200 is a thermistor. Since the thermistor has a simple structure and strong anti-interference ability, it is easy to improve the measurement sensitivity and accuracy of the measuring unit 200 to the combustion-supporting gas, and further to improve the measurement reliability and accuracy of the measuring unit 200 to the combustion-supporting gas.

[0051] Optionally, the control unit controls the intake amount of the combustible gas based on the change in the resistance value of the measuring unit 200 under constant current per unit time. In this way, the heat dissipation of the measuring unit 200 can be calculated by using the change in the resistance value of the measuring unit 200 under constant current, thereby calculating the actual intake amount of the combustion-supporting gas, thereby improving the detection accuracy of the intake amount of the combustion-supporting gas by the water heater 1.

[0052] According to one embodiment of the present invention, Figure 6 As shown, the measuring unit 200 includes an actual measuring unit 210 and a comparison measuring unit 220 matched with the actual measuring unit 210. Both the actual measuring unit 210 and the comparison measuring unit 220 communicate with the control unit, and the control unit controls the intake amount of the combustible gas based on the change in the resistance value of the actual measuring unit 210 compared with the comparison measuring unit 220 per unit time. In this way, the heat dissipation of the actual measuring unit 210 can be calculated by the difference in resistance between the actual measuring unit 210 and the comparison measuring unit 220 under a constant current, thereby calculating the intake amount of the combustion-supporting gas, and further improving the measurement accuracy of the ratio of the combustible gas to the combustion-supporting gas.

[0053] According to another embodiment of the present invention, Figure 6As shown, the measuring unit 200 includes an actual measuring unit 210 and a comparison measuring unit 220 matched with the actual measuring unit 210, and both the actual measuring unit 210 and the comparison measuring unit 220 communicate with the control unit, and the control unit controls the intake amount of the combustion-supporting gas based on the change in the resistance value of the actual measuring unit 210 compared with the comparison measuring unit 220 per unit time. In this way, the heat dissipation of the actual measuring unit 210 can be calculated by the difference in resistance between the actual measuring unit 210 and the comparison measuring unit 220 under a constant current, thereby calculating the intake amount of the combustion-supporting gas, which further facilitates the water heater 1 to control the intake amount of the combustion-supporting gas.

[0054] Specifically, the actual measurement unit 210 and the comparison measurement unit 220 can be two completely identical thermistors, the input currents of the two thermistors are equal, the actual measurement unit 210 is arranged on the flow path of the combustion-supporting gas, and the comparison measurement unit 220 is arranged in a windless environment, and the control unit controls the rotation speed of the fan component 300 based on the change in resistance value of the actual measurement unit 210 compared with the comparison measurement unit 220 per unit time, thereby controlling the air intake amount of the combustion-supporting gas.

[0055] According to another embodiment of the present invention, the control unit controls the intake amount of the combustible gas based on the speed of change of the resistance value of the measuring unit 200 during the period from the first constant current to the second constant current. This facilitates simplifying the structure of the measuring unit 200, reducing the overall size of the measuring unit 200, and reducing the production cost of the measuring unit 200.

[0056] According to another embodiment of the present invention, the control unit controls the intake amount of the combustion-supporting gas based on the speed of change of the resistance value of the measuring unit 200 during the period from the first constant current to the second constant current. This facilitates simplifying the structure of the measuring unit 200, reducing the cost of the measuring unit 200, and thus reducing the production cost of the water heater 1.

[0057] Specifically, the measuring unit 200 can be a thermistor, which is arranged on the flow path of the combustion-supporting gas. The control unit controls the rotation speed of the fan component 300 based on the speed of change of the resistance value of the measuring unit 200 during the period from the first constant current to the second constant current, thereby controlling the air intake amount of the combustion-supporting gas.

[0058] Specifically, the water heater 1 further comprises a gas proportional valve for controlling the intake amount of the combustible gas, the gas proportional valve being arranged in the main body 100, and the gas proportional valve being electrically connected to the control unit. In this way, the gas proportional valve can be used to control the intake amount of the combustible gas, which further facilitates the precise control of the intake amount of the combustible gas and the intake amount of the combustion-supporting gas, so that the combustion-supporting gas and the combustible gas have an accurate ratio, which further facilitates the full combustion of the mixed gas of the combustible gas and the combustion-supporting gas, thereby improving the combustion efficiency of the combustible gas.

[0059] According to a specific embodiment of the present invention, the air supply component 300 includes a fan, and the fan is located below the combustion part 110, and the measuring unit 200 is located at the air inlet of the fan.

[0060] According to another specific embodiment of the present invention, the air supply component 300 includes a fan, which is located above the combustion part 110, and the measuring unit 200 is located at the air inlet of the combustion part 110 or below the combustion part 110. Specifically, the air inlet of the combustion part 110 forms a first air inlet area for combustion-supporting gas, and the bottom of the combustion part 110 forms a second air inlet area for combustion-supporting gas, and the measuring unit 200 can be located in the first air inlet area or in the second air inlet area.

[0061] According to another specific embodiment of the present invention, the measuring unit 200 is located at the air inlet of the combustion part 110 or below the combustion part 110. Specifically, an air inlet area is formed below the combustion part 110, and the measuring unit 200 is located in the air inlet area.

[0062] According to some specific embodiments of the present invention, the water heater 1 includes a combustion unit 110, a measuring unit 200, an air supply component 300, the control unit and the gas proportional valve, the measuring unit 200, the air supply component 300 and the gas proportional valve communicate with the control unit respectively, a combustion-supporting gas flow path is formed in the main body 100, at least a part of the measuring unit 200 is arranged on the combustion-supporting gas flow path, and the measuring unit 200 includes an actual measurement unit 210 and a comparison measurement unit 220. In the production stage of the water heater 1, the corresponding relationship between the change in the resistance value of the measuring unit 200 and the theoretical air intake volume of the combustion-supporting gas can be obtained through experiments, and the corresponding relationship is written into the control unit. When the water heater 1 is working, the control unit can be used to control the working state of the gas proportional valve to control the air intake volume of the combustible gas, and the control unit can be used to control the rotation speed of the air supply component 300 to control the air intake volume of the combustion-supporting gas. At the same time, a constant current can be respectively passed through the actual measurement unit 210 and the comparison measurement unit 220. The actual measurement unit 210 and the comparison measurement unit 220 will generate a certain amount of heat under a certain current, so that the actual measurement unit 210 and the comparison measurement unit 220 have a certain resistance value. Since the actual measurement unit 210 will be cooled when the combustion-supporting gas flows through the measurement unit 200, the resistance value of the actual measurement unit 210 is different from that of the comparison measurement unit 220. According to the difference in resistance value between the actual measurement unit 210 and the comparison measurement unit 220, the control unit can calculate the actual air intake volume of the current combustion-supporting gas, and then adjust the air intake volume of the combustible gas by comparing the actual air intake volume with the theoretical air intake volume, so that the combustible gas and the combustion-supporting gas reach a suitable proportional relationship.

[0063] According to some other specific embodiments of the present invention, the water heater 1 includes a combustion unit 110, a measuring unit 200, an air supply component 300, the control unit and the gas proportional valve, the measuring unit 200, the air supply component 300 and the gas proportional valve communicate with the control unit respectively, a combustion-supporting gas flow path is formed in the main body 100, at least a part of the measuring unit 200 is arranged on the combustion-supporting gas flow path, and the measuring unit 200 includes an actual measurement unit 210 and a comparison measurement unit 220. In the production stage of the water heater 1, the corresponding relationship between the change in the resistance value of the measuring unit 200 and the theoretical air intake volume of the combustion-supporting gas can be obtained through experiments, and the corresponding relationship can be written into the control unit. When the water heater 1 is working, the control unit can be used to control the working state of the gas proportional valve to control the air intake volume of the combustible gas, and the control unit can be used to control the rotation speed of the air supply component 300 to control the air intake volume of the combustion-supporting gas. At the same time, a constant current can be respectively passed through the actual measurement unit 210 and the comparison measurement unit 220. The actual measurement unit 210 and the comparison measurement unit 220 will generate a certain amount of heat under a certain current, so that the actual measurement unit 210 and the comparison measurement unit 220 have a certain resistance value. Since the combustion-supporting gas will dissipate heat and cool the actual measurement unit 210 when it flows through the measurement unit 200, the actual measurement unit 210 and the comparison measurement unit 220 have different resistance values. According to the difference between the resistance value of the actual measurement unit 210 and the resistance value of the comparison measurement unit 220, the control unit can calculate the actual air intake of the current combustion-supporting gas. When the actual air intake is not equal to the theoretical air intake, the rotation speed of the air supply component 300 is adjusted to make the actual air intake equal to the theoretical air intake. For example, when the actual air intake is less than the theoretical air intake, it is determined that the smoke exhaust component or the heat exchanger is blocked, or the external wind pressure resistance increases, and the rotation speed of the air supply component 300 can be increased to maintain the stability of the air intake of the combustion-supporting gas.

[0064] In some embodiments of the present invention, the resistance element of the forced-drum gas water heater is installed at the air intake of the fan, the air outlet of the fan, and the smoke exhaust position. The resistance element of the forced-draft gas water heater is installed near the primary air intake and below the burner.

[0065] In some embodiments, a measuring unit composed of a thermoelectric element is installed on the gas water heater to control the amount of combustible gas intake by obtaining wind speed information. The thermoelectric element with increased temperature will be cooled when it encounters air.

[0066] In other embodiments, a measuring unit composed of a thermal resistor element is installed on the gas water heater to control the amount of combustible gas intake by obtaining wind speed information.

[0067] In some embodiments, current is passed through the actual thermal resistor element installed at the location where the wind speed is measured to heat it and measure the resistance value. Current is also passed through the comparison thermal resistor element installed at the windless location to measure the resistance value. When there is wind, heat will be dissipated, and the resistance values ​​of the thermal resistor elements at the two locations will differ depending on the degree of heat dissipation. Using this principle, the wind speed at the air supply location of the gas water heater is detected to calculate the air volume, thereby controlling the amount of gas.

[0068] In other embodiments, only one thermal resistor element is used, and a thermal resistor element is set at the wind speed measurement position in the gas water heater, and a current value A is passed through and the resistance value is measured, and this action is continued. The resistance value is measured after the current value is reduced to B. Then, the wind speed is measured by measuring the time from A to B.

[0069] Specifically, when used to control the intake amount of combustible gas, on the gas water heater, the corresponding relationship between wind speed and gas amount is pre-written into the microprocessor of the control unit and memorized, and then the corresponding gas amount is provided according to the wind speed obtained during the combustion process.

[0070] Specifically, when used to control the intake amount of combustion-supporting gas, the pre-measured correspondence between the fan speed and wind speed is written into the microprocessor of the control unit and memorized. During the actual combustion process of the water heater, once the air volume decreases by a certain amount, the fan speed is increased to maintain the air volume.

[0071] In addition, when the air volume decreases under the same rotational speed conditions, it is determined that a major failure has occurred and a safety action is initiated to stop combustion.

[0072] In other embodiments of the present invention, the combustion state is controlled according to the temperature. The air supply temperature is detected, and the air volume is increased when the temperature is high. Once the air supply temperature increases, the density of the air will decrease, and the combustion will deteriorate when the air volume is constant. By using a thermal resistor element to detect the wind speed and the air temperature at the same time, and according to the wind speed-rotation number relationship memorized in advance, the fan speed required to increase the air temperature is increased.

[0073] When the temperature is low, the ignition speed is reduced. When the water heater is ignited at low temperature, the balance of air and gas in the combustion chamber will change compared to the normal room temperature. Due to this change, problems such as poor ignition and combustion vibration will occur. By using a thermal resistor element to detect the wind speed and the air temperature at the same time, and based on the wind speed-speed relationship memorized in advance, the fan speed is adjusted when the air temperature is low.

[0074] Specifically, the water heating device 1 may be a gas water heater or a gas wall-mounted boiler.

[0075] The working process of the water heater 1 according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0076] When hot water needs to be prepared, the control unit calculates the theoretical intake amount of the combustible gas and the theoretical intake amount of the combustion-supporting gas by the outlet water temperature of the hot water, controls the intake amount of the combustible gas by controlling the working state of the gas proportional valve, and controls the intake amount of the combustion-supporting gas by controlling the rotation speed of the air supply component 300. At the same time, a constant current is respectively passed through the actual measurement unit 210 and the comparison measurement unit 220, and the actual measurement unit 210 is cooled when the combustion-supporting gas flows through the measurement unit 200, and the difference in resistance between the actual measurement unit 210 and the comparison measurement unit 220 is measured. The control unit calculates the actual intake amount of the combustion-supporting gas by the difference, and then compares the actual intake amount of the combustion-supporting gas with the theoretical intake amount, and adjusts the intake amount of the combustion-supporting gas by adjusting the rotation speed of the air supply component 300, so as to achieve a suitable ratio of the combustible gas to the combustion-supporting gas.

[0077] Other structures and operations of the water heating device 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0079] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0080] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0082] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hot water device, characterized in that: include: A main body, the main body having a combustion part, the combustion part generating heat by burning a mixture of a combustion-supporting gas and a combustible gas; A measuring unit, the measuring unit is arranged in the main body, and the measuring unit has a resistance element that changes with temperature, and the measuring unit is used to obtain the air intake volume of the combustion-supporting gas; as well as A control unit, the control unit communicates with the measuring unit, and the control unit controls the intake amount of the combustible gas according to the measurement value of the measuring unit; The control unit controls the intake amount of the combustible gas based on the change in the resistance value of the measuring unit under constant current within a unit time; The measuring unit comprises: an actual measuring unit and a comparison measuring unit matched with the actual measuring unit, the actual measuring unit and the comparison measuring unit both communicate with the control unit, and the control unit controls the intake amount of the combustible gas based on the change in the resistance value of the actual measuring unit compared with the comparison measuring unit within a unit time; The corresponding relationship between the change in the resistance value of the actual measurement unit compared with the comparison measurement unit and the air intake volume of the combustion-supporting gas is obtained through experiments, and the air intake volume of the combustible gas is controlled according to the air intake volume of the combustion-supporting gas; It also includes: an air supply component, which is installed on the main body and is used to transport combustion-supporting gas. The control unit is connected to the air supply component and is used to control the air supply volume of the air supply component.

2. The water heating device according to claim 1, characterized in that: The measuring unit is arranged on the air supply component.

3. The water heating device according to claim 2, characterized in that: The measuring unit is located at the air supply inlet of the air supply component or below the combustion part or at the combustion part air inlet of the combustion part.

4. The water heating device according to claim 1, characterized in that: A combustion-supporting gas flow path is formed in the main body, and at least a part of the measuring unit is arranged on the combustion-supporting gas flow path.

5. The water heating device according to claim 1, characterized in that: The measuring unit is a thermistor.

6. The water heating device according to claim 1, characterized in that: The control unit controls the intake amount of the combustible gas based on how fast the resistance value of the measurement unit changes during a period when the first constant current drops to the second constant current.

7. The water heating device according to claim 1, characterized in that: It also includes a gas proportional valve for controlling the intake amount of combustible gas. The gas proportional valve is arranged in the main body and is electrically connected to the control unit.

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