A control method and system for a combined heating and hot water boiler system

Abstract

The application discloses a heating and hot water stove system control method and system, and provides the heating and hot water stove system control method, through setting the first set temperature and the second set temperature, when the water temperature in the water storage tank is lower than the first temperature, the bathroom heating circuit is controlled to be turned on, the water in the water storage tank is heated until the water temperature is greater than the second set temperature, the heating circuit is controlled to be turned on, and heating is provided for users, and since the water temperature in the water storage tank cannot be reduced from the second set temperature to the first set temperature in a short time, the heating and hot water stove cannot frequently switch between the water use on the bathroom side and the water use on the heating side when hot water is frequently used in a short time, the heating effect is improved, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of heating equipment technology, and in particular to a control method and system for a heating hot water boiler system. Background Technology

[0002] Gas-fired heating and hot water boilers, also known as "gas-fired wall-mounted boilers," are devices that rely on natural gas to provide hot water and heating.

[0003] Existing gas-fired heating and hot water boilers have separate heating circuits for bathrooms and heating systems. When the boiler is operating, the burner heats the water in either circuit to provide hot water or heating for the user. The boiler is equipped with a water flow sensor to detect water flow in the bathroom outlet pipes. Normally, when the bathroom is not in use, the boiler prioritizes supplying hot water to the heaters used for heating. When the user flushes the bathroom, the sensor detects the flow and the boiler switches its supply to the bathroom, providing hot water there.

[0004] Existing heating water heaters immediately switch to the bathroom water supply upon receiving a water flow signal, and switch to the heating water supply when no water flow signal is received. When hot water is used frequently in a short period during winter, the heating water heater will frequently switch between the bathroom and heating water supply. Heating both domestic water and water in the heating circuit takes time. If the heating water heater frequently switches between the bathroom and heating water supply in a short period, not only will the domestic water be difficult to heat to the user's required temperature, but the heating effect will also decrease, resulting in a poor user experience. Summary of the Invention

[0005] One of the technical problems solved by this invention is to provide a control method for a heating hot water boiler system that can maintain a stable water temperature for domestic use, improve heating efficiency, and enhance user experience.

[0006] The second technical problem solved by this invention is to provide a heating hot water boiler system that can maintain a stable water temperature for domestic use, improve heating efficiency, and enhance user experience.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A method for controlling a heating hot water boiler system includes:

[0009] Obtain the water temperature in the water storage tank that supplies hot water in the bathroom heating circuit;

[0010] Determine whether the water temperature in the water storage tank is lower than a preset first set temperature;

[0011] If the water temperature in the water storage tank is lower than the first set temperature, the bathroom heating circuit is turned on and the heating circuit is turned off to heat the water in the water storage tank until the water temperature in the water storage tank reaches the preset second set temperature, which is greater than the first set temperature.

[0012] Determine whether the water temperature in the water storage tank is greater than or equal to the second set temperature;

[0013] If the water temperature in the water tank is greater than or equal to the second set temperature, the heating circuit is turned on and the bathroom heating circuit is turned off, and the process returns to the step of determining whether the water temperature in the water tank is less than the preset first set temperature; if the water temperature in the water tank is greater than or equal to the first set temperature, the heating circuit is turned on and the bathroom heating circuit is turned off, and the process returns to the step of determining whether the water temperature in the water tank is less than the preset first set temperature.

[0014] If the water temperature in the water storage tank is lower than the second set temperature, then return to the step of heating the water in the water storage tank.

[0015] The heating and hot water boiler system control method provided in this embodiment of the invention sets a first set temperature and a second set temperature. When the water temperature in the storage tank is lower than the first temperature, the system controls the activation of the bathroom heating circuit to heat the water in the storage tank until the water temperature reaches the preset second set temperature. Since the second set temperature is higher than the first set temperature, the water temperature in the tank will not drop below the first set temperature in a short period of time. Therefore, when the water temperature in the tank is higher than the second set temperature, even if the user uses domestic hot water multiple times in a short period of time, the heating circuit will not switch to the bathroom heating circuit. This prevents the heating and hot water boiler from frequently switching between water use on the bathroom side and water use on the heating side, maintaining heating while ensuring the user's hot water comfort, thus improving the user experience. Furthermore, the fact that the heating and hot water boiler does not frequently switch between water use on the bathroom side and water use on the heating side when the user uses hot water frequently in a short period of time helps improve the operational stability of the heating and hot water boiler, thereby extending its service life.

[0016] In one embodiment, the heating hot water boiler system control method further includes:

[0017] During the heating of water in the storage tank, the outlet water temperature of the heating hot water boiler is obtained, and it is determined whether the outlet water temperature of the heating hot water boiler is greater than the preset safe water temperature.

[0018] If the outlet water temperature of the heating hot water boiler is greater than the safe water temperature, then the heating circuit is controlled to be turned on and the bathroom heating circuit is turned off.

[0019] If the outlet water temperature of the heating hot water boiler is less than or equal to the safe water temperature and the water temperature in the storage tank is less than the second set temperature, then return to the step of heating the water in the storage tank.

[0020] In one embodiment, after controlling the heating circuit to be turned on and the bathroom heating circuit to be turned off, the method further includes:

[0021] Determine whether the heating water boiler is operating in winter mode;

[0022] If the heating water boiler is operating in winter mode, then determine whether the outlet water temperature of the heating water boiler is greater than or equal to the third set temperature.

[0023] If the outlet water temperature of the heating hot water boiler is less than the third set temperature, the heating circuit is controlled to be turned on and the bathroom heating circuit is cut off to heat the heating water in the heating circuit until the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature.

[0024] If the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature, the heating circuit is turned on and the bathroom heating circuit is cut off. The heating hot water boiler stops heating and returns to the step of judging whether the water temperature in the storage tank is less than the preset first set temperature.

[0025] If the heating water boiler is not operating in winter mode, the control circuit is turned on and the bathroom heating circuit is cut off. The heating water boiler stops heating and returns to the step of determining whether the water temperature in the storage tank is lower than the preset first set temperature.

[0026] In one embodiment, the process further includes: […] before controlling the heating circuit to be switched on and the bathroom heating circuit to be switched off.

[0027] Determine whether the heating water boiler is operating in winter mode;

[0028] If the heating water boiler is operating in winter mode, the heating circuit is switched on and the bathroom heating circuit is switched off. It is then determined whether the outlet water temperature of the heating water boiler is greater than or equal to the third set temperature.

[0029] If the outlet water temperature of the heating hot water boiler is less than the third set temperature, the heating circuit is controlled to be turned on and the bathroom heating circuit is cut off to heat the heating water in the heating circuit until the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature.

[0030] If the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature, the heating circuit is turned on and the bathroom heating circuit is cut off. The heating hot water boiler stops heating and returns to the step of judging whether the water temperature in the storage tank is less than the preset first set temperature.

[0031] If the heating water boiler is not operating in winter mode, the control circuit is turned on and the bathroom heating circuit is cut off. The heating water boiler stops heating and returns to the step of determining whether the water temperature in the storage tank is lower than the preset first set temperature.

[0032] In one embodiment, the first set temperature is not greater than the user-set temperature;

[0033] And / or the second set temperature is not less than the user-set temperature.

[0034] In one embodiment, the bathroom heating circuit is equipped with a mixing pump, the inlet and outlet of which are both connected to the water storage tank. The method further includes:

[0035] During the heating of the water in the storage tank, the mixing pump is started.

[0036] In one embodiment, after controlling the heating water boiler to stop heating, the method further includes:

[0037] Control the idling time of the circulating water pump and fan in the heating hot water boiler for a preset duration.

[0038] The second technical problem mentioned above is solved by the following technical solution:

[0039] A heating hot water boiler system, comprising:

[0040] A heating hot water boiler includes a controller, a burner, a first heat exchanger, a three-way valve, and a first circulating pump. The three-way valve is connected to the controller, the outlet of the first heat exchanger is connected to the inlet of the three-way valve, and the outlet of the first circulating pump is connected to the inlet of the first heat exchanger.

[0041] A bathroom heating circuit includes a water storage tank, a second heat exchanger, and a first temperature sensor. The second heat exchanger and the first temperature sensor are disposed in the water storage tank. The inlet of the second heat exchanger is connected to the first outlet of the three-way valve. The outlet of the second heat exchanger is connected to the inlet of the first circulating pump. The first temperature sensor is connected to the controller.

[0042] The heating circuit includes a heater, the inlet of which is connected to the second outlet of the three-way valve, and the outlet of which is connected to the inlet of the first circulating pump.

[0043] The heating hot water boiler system provided in this embodiment of the invention includes a heating hot water boiler, a bathroom heating circuit, and a heating circuit. The heating hot water boiler includes a controller, a first heat exchanger, a three-way valve, and a first circulating pump. The three-way valve is connected to the controller. The outlet of the first heat exchanger is connected to the inlet of the three-way valve. The outlet of the first circulating pump is connected to the inlet of the first heat exchanger. The bathroom heating circuit includes a water storage tank, a second heat exchanger, and a first temperature sensor. The second heat exchanger and the first temperature sensor are disposed in the water storage tank. The inlet of the second heat exchanger is connected to the first outlet of the three-way valve. The outlet of the second heat exchanger is connected to the inlet of the first circulating pump. The first temperature sensor is connected to the controller. The heating circuit includes a heater. The inlet of the heater is connected to the second outlet of the three-way valve. The outlet of the heater is connected to the inlet of the first circulating pump. The controller acquires the water temperature in the water storage tank collected by the first temperature sensor. The water temperature in the water storage tank is lower than the first temperature sensor. When the water temperature in the tank exceeds the second set temperature, the controller activates the three-way valve to open the bathroom heating circuit, heating the water in the storage tank. When the water temperature in the tank exceeds the second set temperature, the controller activates the three-way valve to open the heating circuit, providing heating to the user. Because the second set temperature is higher than the first set temperature, the water temperature in the tank will not drop below the first set temperature in a short period. Therefore, even if the user uses hot water multiple times in a short period when the water temperature is higher than the second set temperature, the heating circuit will not switch to the bathroom heating circuit. This prevents the heating boiler from frequently switching between bathroom and heating water supply, maintaining heating while ensuring user comfort and improving user experience. Furthermore, the fact that the heating boiler does not frequently switch between bathroom and heating water supply when the user uses hot water frequently in a short period enhances the stability of the boiler's operation and extends its service life.

[0044] In one embodiment, the heating hot water boiler further includes a second temperature sensor, which is disposed on the pipeline between the first heat exchanger and the three-way valve, for collecting the outlet water temperature of the heating hot water boiler, and the second temperature sensor is connected to the controller.

[0045] In one embodiment, the heating hot water boiler system further includes a second circulation pump, wherein the outlet of the second heat exchanger and the outlet of the heater are both connected to the inlet of the second circulation pump, and the outlet of the second circulation pump is connected to the inlet of the first circulation pump.

[0046] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A flowchart of a heating hot water boiler system control method provided in an embodiment of the present invention;

[0049] Figure 2 A flowchart of another heating hot water boiler system control method provided in an embodiment of the present invention;

[0050] Figure 3 A flowchart of another heating hot water boiler system control method provided in an embodiment of the present invention;

[0051] Figure 4 A flowchart of another heating hot water boiler system control method provided in an embodiment of the present invention;

[0052] Figure 5 This is a schematic diagram of a heating hot water boiler system provided in an embodiment of the present invention.

[0053] In the picture:

[0054] 110. Heating hot water boiler; 111. First heat exchanger; 112. Three-way valve; 113. Burner; 114. Second temperature sensor; 115. First circulation pump; 116. Water supply valve; 121. Water storage tank; 122. Second heat exchanger; 123. First temperature sensor; 124. Mixing water pump; 131. Heater; 140. Second circulation pump.

[0055] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0056] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0057] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0058] Figure 1 This is a flowchart illustrating a control method for a heating hot water boiler system according to an embodiment of the present invention. This embodiment is applicable to situations where the heating hot water boiler switches between water use on the bathroom side and water use on the heating side using temperature control. This method can be executed by a controller in the heating hot water boiler. The heating hot water boiler system includes a bathroom heating circuit and a heating circuit. The heating circuit includes a water storage tank for outputting hot water. Figure 1 As shown, the control method for a heating hot water boiler system includes the following steps:

[0059] S101. Obtain the water temperature in the water storage tank that supplies hot water in the bathroom heating circuit.

[0060] In this embodiment of the invention, the bathroom heating circuit includes a water storage tank for storing domestic water. Hot water output from the heating boiler exchanges heat with the water in the storage tank, thereby heating the water in the tank. In this embodiment, a temperature sensor can be installed in the water storage tank to collect the water temperature. The temperature sensor collects the water temperature in the storage tank at a predetermined frequency and uploads the data to the controller.

[0061] S102. Determine whether the water temperature in the water storage tank is lower than the preset first set temperature.

[0062] After obtaining the water temperature in the storage tank, the water temperature in the storage tank is compared with a preset first set temperature to determine whether the water temperature in the storage tank is lower than the preset first set temperature. In this embodiment of the invention, the first set temperature is not greater than the user-set temperature. For example, the first set temperature can be the user-set temperature minus a first bias value. For instance, if the user-set temperature is 40℃, the first bias value can be 2℃, then the first set temperature is 38℃. If the water temperature in the storage tank is lower than the preset first set temperature, then step S103 is executed; if the water temperature in the storage tank is greater than or equal to the preset first set temperature, then step S105 is executed.

[0063] S103, control the connection of the bathroom heating circuit and cut off the heating circuit to heat the water in the water storage tank.

[0064] If the water temperature in the storage tank is lower than the first set temperature, it indicates that the water temperature in the storage tank is too low and does not meet the user's domestic water needs. In this case, the bathroom heating circuit is activated while the heating circuit is disconnected. The heating water heater supplies hot water to the bathroom heating circuit, and the hot water output from the heating water heater exchanges heat with the water in the storage tank, thereby heating the water in the storage tank until the water temperature reaches the preset second set temperature, where the second set temperature is higher than the first set temperature. In this embodiment of the invention, the second set temperature is not lower than the user-set temperature. For example, the second set temperature can be the user-set temperature plus a second bias value. For instance, if the user-set temperature is 40℃, the second bias value can be 2℃, then the second set temperature is 42℃.

[0065] S104. Determine whether the water temperature in the water storage tank is greater than or equal to the preset second set temperature.

[0066] S105, control the heating circuit to be turned on and cut off the bathroom heating circuit.

[0067] In step S104, if the water temperature in the water storage tank is greater than or equal to the second set temperature, then proceed to step S105, control the heating circuit to be turned on and cut off the bathroom heating circuit.

[0068] During the water heating process in the storage tank, the water temperature in the storage tank is continuously monitored and compared with a preset second set temperature to determine whether the water temperature in the storage tank is greater than the preset second set temperature. If the water temperature in the storage tank is greater than the preset second set temperature, the heating circuit is activated and the bathroom heating circuit is cut off. The heating water heater supplies hot water to the heating circuit for the user's heating, and then returns to step S102 to determine whether the water temperature in the storage tank is less than the preset first set temperature.

[0069] If the water temperature in the storage tank is lower than the second set temperature, return to step S103.

[0070] In this embodiment of the invention, because the second set temperature is higher than the first set temperature, the water temperature in the tank will not drop below the first set temperature in a short period of time. Therefore, when the water temperature in the tank is higher than the second set temperature, if the user uses domestic hot water multiple times in a short period of time, the heating circuit will not switch to the bathroom heating circuit. This prevents the heating water heater from frequently switching between water use on the bathroom side and water use on the heating side, maintaining heating while ensuring the user's hot water comfort, thus improving the user experience. Furthermore, the fact that the heating water heater does not frequently switch between water use on the bathroom side and water use on the heating side when the user uses hot water frequently in a short period of time helps improve the operational stability of the heating water heater, thereby extending its service life.

[0071] Figure 2 A flowchart of another heating hot water boiler system control method provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method includes:

[0072] S201. Obtain the water temperature in the water storage tank that supplies hot water in the bathroom heating circuit.

[0073] As mentioned above, in this embodiment of the invention, a first temperature sensor may be installed in the water storage tank to collect the water temperature in the tank. The first temperature sensor collects the water temperature in the tank at a predetermined sampling frequency and uploads it to the controller.

[0074] S202. Determine whether the water temperature in the water storage tank is lower than the preset first set temperature.

[0075] The water temperature in the storage tank is compared with a preset first set temperature to determine whether the water temperature in the storage tank is lower than the preset first set temperature. In this embodiment of the invention, the first set temperature is not greater than the user-set temperature. For example, the first set temperature can be the user-set temperature minus a first bias value. For instance, if the user-set temperature is 40℃, the first bias value can be 2℃, then the first set temperature is 38℃. If the water temperature in the storage tank is lower than the preset first set temperature, step S203 is executed; if the water temperature in the storage tank is greater than or equal to the preset first set temperature, step S205 is executed, and the process returns to step S202.

[0076] S203, control the connection of the bathroom heating circuit and cut off the heating circuit to heat the water in the water storage tank.

[0077] If the water temperature in the storage tank is lower than the first set temperature, it means that the water temperature in the storage tank is too low and does not meet the user's domestic water needs. In this case, the control will turn on the bathroom heating circuit and cut off the heating circuit. The heating water heater will supply hot water to the bathroom heating circuit. The hot water output by the heating water heater will exchange heat with the water in the storage tank, thereby heating the water in the storage tank.

[0078] S204. Determine whether the water temperature in the water storage tank is greater than or equal to the preset second set temperature, and determine whether the outlet water temperature of the heating hot water boiler is greater than the preset safe water temperature.

[0079] In this embodiment of the invention, a second temperature sensor may be installed on the outlet pipe of the heating hot water boiler to collect the outlet water temperature of the heating hot water boiler. During the heating of water in the storage tank, the second temperature sensor collects the outlet water temperature of the heating hot water boiler at a predetermined collection frequency and uploads it to the controller.

[0080] During the heating process of the water in the storage tank, the water temperature in the storage tank is continuously monitored, and the outlet water temperature of the heating water boiler and the water temperature in the storage tank are continuously compared. The water temperature in the storage tank is compared with a preset second set temperature to determine whether the water temperature in the storage tank is greater than the preset second set temperature. The outlet water temperature of the heating water boiler is compared with a preset safe water temperature to determine whether the heating water boiler is dry-burning. The second set temperature is greater than the first set temperature. In this embodiment of the invention, the second set temperature is not less than the user-set temperature. For example, the second set temperature can be the user-set temperature plus a second bias value. For instance, if the user-set temperature is 40℃, the second bias value can be 2℃, then the second set temperature is 42℃. The safe water temperature can be set to 90℃.

[0081] If the water temperature in the storage tank is greater than or equal to the preset second set temperature or the water outlet temperature of the heating hot water boiler is greater than the preset safe water temperature, i.e., both conditions are met, then step S205 is executed; if the water temperature in the storage tank is less than the preset second set temperature and the water outlet temperature of the heating hot water boiler is less than or equal to the preset safe water temperature, then step S203 is executed again.

[0082] S205, Control the heating circuit to be turned on and cut off the bathroom heating circuit.

[0083] If the water temperature in the storage tank is greater than or equal to the preset second set temperature, or the outlet water temperature of the heating water boiler is greater than the safe water temperature, the heating circuit is activated and the bathroom heating circuit is disconnected. The process then returns to step S202, determining whether the water temperature in the storage tank is less than the preset first set temperature, and this cycle repeats. The heating water boiler supplies hot water to the heating circuit for user heating. Furthermore, the main cause of dry burning in the heating water boiler is blockage in the bathroom heating circuit. In this embodiment of the invention, when the outlet water temperature of the heating water boiler is greater than the safe water temperature (i.e., dry burning occurs), the heating circuit is activated and the bathroom heating circuit is disconnected, allowing the water in the heating water boiler to flow and dissipate heat through the heating circuit, thus preventing damage caused by dry burning.

[0084] Figure 3A flowchart of another heating hot water boiler system control method provided in an embodiment of the present invention is shown below. Figure 3 As shown, this embodiment further defines the previous embodiment by adding a determination of the operating mode of the heating hot water boiler after the heating circuit is turned on. The parts identical to those in the previous embodiments will not be repeated here. The method includes:

[0085] S301. Obtain the water temperature in the water storage tank that supplies hot water in the bathroom heating circuit.

[0086] S302. Determine whether the water temperature in the water storage tank is lower than the preset first set temperature.

[0087] The water temperature in the storage tank is compared with a preset first set temperature to determine whether the water temperature in the storage tank is lower than the preset first set temperature. If the water temperature in the storage tank is lower than the preset first set temperature, step S303 is executed; if the water temperature in the storage tank is greater than or equal to the preset first set temperature, step S305 is executed.

[0088] S303, control the connection of the bathroom heating circuit and cut off the heating circuit to heat the water in the water storage tank.

[0089] S304. Determine whether the water temperature in the water storage tank is greater than or equal to the preset second set temperature, and determine whether the outlet water temperature of the heating hot water boiler is greater than the preset safe water temperature.

[0090] During the water heating process in the storage tank, the water temperature in the storage tank and the outlet water temperature of the heating water boiler are continuously monitored. If the water temperature in the storage tank is greater than or equal to the preset second set temperature, or the outlet water temperature of the heating water boiler is greater than the safe water temperature, then step S305 is executed. If the water temperature in the storage tank is less than the preset second set temperature and the outlet water temperature of the heating water boiler is less than or equal to the safe water temperature, then the water temperature in the storage tank continues to be monitored, and the process returns to step S303.

[0091] S305, Control the heating circuit to be turned on and cut off the bathroom heating circuit.

[0092] If the water temperature in the storage tank is greater than or equal to the preset second set temperature, or the outlet water temperature of the heating water boiler is greater than the safe water temperature, the control will connect the heating circuit and disconnect the bathroom heating circuit.

[0093] S306. Determine whether the heating hot water boiler is operating in winter mode.

[0094] In this embodiment of the invention, the heating water boiler has a winter mode and a summer mode. In the winter mode, hot water needs to be supplied to the heating circuit, while in the summer mode, hot water does not need to be supplied to the heating circuit. If the heating water boiler is operating in the winter mode, step S307 is executed; if the heating water boiler is not operating in the winter mode (i.e., operating in the summer mode), step S308 is executed.

[0095] S307. Determine whether the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature.

[0096] If the heating water boiler is operating in winter mode, it means that hot water needs to be supplied to the heating circuit. Therefore, it is further determined whether the outlet water temperature of the heating water boiler is greater than or equal to the third set temperature. If the outlet water temperature of the heating water boiler is greater than or equal to the third set temperature, it means that the set heating temperature has been reached, and step S308 is executed. If the outlet water temperature of the heating water boiler is less than the third set temperature, it means that the set heating temperature has not been reached, and step S3071 is executed, then the process returns to S307 until the outlet water temperature of the heating water boiler is greater than or equal to the third set temperature.

[0097] S3071, Control the connection of the heating circuit and disconnect the bathroom heating circuit to heat the heating water in the heating circuit.

[0098] S308, control the heating circuit to be connected and cut off the bathroom heating circuit, and control the heating hot water boiler to stop heating.

[0099] If the heating water heater is not operating in winter mode (i.e., operating in summer mode), it means that there is no need to supply hot water to the heating circuit. Alternatively, if the outlet water temperature of the heating water heater is greater than or equal to the third set temperature, it means that the set heating temperature has been reached. In this case, the heating circuit is turned on and the bathroom heating circuit is cut off. The heating water heater is controlled to stop heating and the process returns to step S302 to determine whether the water temperature in the storage tank is lower than the preset first set temperature.

[0100] In some embodiments of the present invention, the bathroom heating circuit is equipped with a mixing water pump, the inlet and outlet of which are both connected to a water storage tank. The method further includes:

[0101] During the heating of water in the storage tank, the mixing water pump is started to agitate the water in the storage tank, reducing the water temperature stratification caused by poor water flow in the storage tank when the second heat exchanger is heating, thereby reducing the lag in the collected water temperature in the storage tank.

[0102] In some embodiments of the present invention, after the heating water boiler stops heating, the circulating water pump and fan in the heating water boiler can also be controlled to idle for a preset time. Idling the circulating water pump keeps the water flowing in the pipes, preventing heat buildup in the heating water boiler from damaging its components. Idling the fan can expel residual gas in the heating water boiler, preventing accidents that may be caused by residual gas.

[0103] Figure 4 A flowchart of another heating hot water boiler system control method provided in an embodiment of the present invention is shown below. Figure 4 As shown, this embodiment further defines the previous embodiment by adding a determination of the operating mode of the heating hot water boiler before connecting the heating circuit. The parts identical to those in the previous embodiments will not be repeated here. The method includes:

[0104] S401. Obtain the water temperature in the water storage tank that supplies hot water in the bathroom heating circuit.

[0105] S402. Determine whether the water temperature in the water storage tank is lower than the preset first set temperature.

[0106] The water temperature in the storage tank is compared with a preset first set temperature to determine whether the water temperature in the storage tank is lower than the preset first set temperature. If the water temperature in the storage tank is lower than the preset first set temperature, step S403 is executed; if the water temperature in the storage tank is greater than or equal to the preset first set temperature, step S405 is executed.

[0107] S403: Control the connection of the bathroom heating circuit and cut off the heating circuit to heat the water in the water storage tank until the water temperature in the water storage tank reaches the preset second set temperature.

[0108] S404. Determine whether the water temperature in the water storage tank is greater than or equal to the preset second set temperature, and determine whether the outlet water temperature of the heating hot water boiler is greater than the preset safe water temperature.

[0109] During the heating process of the water in the storage tank, the water temperature in the storage tank and the outlet water temperature of the heating water boiler are continuously monitored. If the water temperature in the storage tank is greater than or equal to the preset second set temperature, or the outlet water temperature of the heating water boiler is greater than the safe water temperature, then step S405 is executed. If the water temperature in the storage tank is less than the preset second set temperature, and the outlet water temperature of the heating water boiler is less than or equal to the safe water temperature, then step S403 is executed again to continue monitoring the water temperature in the storage tank.

[0110] S405. Determine whether the heating hot water boiler is operating in winter mode.

[0111] In this embodiment of the invention, the heating water boiler has a winter mode and a summer mode. In the winter mode, hot water needs to be supplied to the heating circuit, while in the summer mode, hot water does not need to be supplied to the heating circuit. If the heating water boiler is operating in the winter mode, step S406 is executed; if the heating water boiler is not operating in the winter mode (i.e., operating in the summer mode), it means that hot water does not need to be supplied to the heating circuit, indicating that there is no heating demand, so step S408 is executed, and the process returns to execute S402.

[0112] S406, Control the heating circuit to be turned on and cut off the bathroom heating circuit.

[0113] If the heating water heater is operating in winter mode, it means that hot water needs to be supplied to the heating circuit. In this case, the control will connect the heating circuit and disconnect the bathroom heating circuit, and supply hot water to the heating circuit.

[0114] S407. Determine whether the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature.

[0115] After supplying hot water to the heating circuit, it is further determined whether the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature. If the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature, it means that the set heating temperature has been reached, and step S408 is executed; if the outlet water temperature of the heating hot water boiler is less than the third set temperature, it means that the set heating temperature has not been reached, and step S4071 is executed, and the process returns to execute S407 until the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature.

[0116] S4071, Control the connection of the heating circuit and disconnect the bathroom heating circuit to heat the heating water in the heating circuit.

[0117] S408, control the heating circuit to be turned on and cut off the bathroom heating circuit, and control the heating hot water boiler to stop heating.

[0118] When the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature, it indicates that the heating temperature has been reached. Then, the heating circuit is turned on and the bathroom heating circuit is cut off. The heating hot water boiler is stopped from heating and the process returns to execute S402 to determine whether the water temperature in the storage tank is lower than the preset first set temperature.

[0119] In some embodiments of the present invention, the bathroom heating circuit is equipped with a mixing water pump, the inlet and outlet of which are both connected to a water storage tank. The method further includes:

[0120] During the heating of water in the storage tank, the mixing water pump is started to agitate the water in the storage tank, reducing the water temperature stratification caused by poor water flow in the storage tank when the second heat exchanger is heating, thereby reducing the lag in the collected water temperature in the storage tank.

[0121] In some embodiments of the present invention, after the heating water boiler stops heating, the circulating water pump and fan in the heating water boiler can also be controlled to idle for a preset time. Idling the circulating water pump keeps the water flowing in the pipes, preventing heat buildup in the heating water boiler from damaging its components. Idling the fan can expel residual gas in the heating water boiler, preventing accidents that may be caused by residual gas.

[0122] This invention also provides a heating hot water boiler system. Figure 5 This is a schematic diagram of a heating hot water boiler system provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the heating hot water boiler system includes:

[0123] A heating hot water boiler 110 includes a controller (not shown), a burner 113, a first heat exchanger 111, a three-way valve 112, and a first circulation pump 115, all connected to the controller. The air inlet of the burner 113 is connected to the gas inlet C of the heating hot water boiler 110. The gas inlet C is connected to a gas pipeline for supplying combustible gas (e.g., natural gas) to the burner 113. The high-temperature flue gas generated by the combustion of the combustible gas in the burner 113 heats the water in the first heat exchanger 111. Exemplarily, the burner 113 can be a plate burner; this embodiment of the invention is not limited thereto. The water outlet of the first heat exchanger 111 is connected to the water inlet of the three-way valve 112, and the water outlet of the first circulation pump 115 is connected to the water inlet of the first heat exchanger 111.

[0124] A bathroom heating circuit includes a water storage tank 121, a second heat exchanger 122, and a first temperature sensor 123. The second heat exchanger 122 and the first temperature sensor 123 are housed within the water storage tank 121, which stores domestic water. The inlet of the second heat exchanger 122 is connected to the first outlet of a three-way valve 112, and the outlet of the second heat exchanger 122 is connected to the inlet of a first circulating pump 115. The first temperature sensor 123 is connected to a controller and is used to collect the water temperature in the water storage tank 121. For example,... Figure 5As shown, the first outlet of the three-way valve 112 is connected to the hot water outlet A of the heating water boiler 110 via a pipe, and the hot water outlet A is connected to the inlet of the second heat exchanger 122 via a pipe. Hot water in the first heat exchanger 111 can be transported to the second heat exchanger 122 through the first outlet of the three-way valve 112. The hot water in the second heat exchanger 122 exchanges heat with the domestic water in the storage tank 121, heating the domestic water in the storage tank 121. Exemplarily, in some embodiments of the present invention, the second heat exchanger 122 can be a coil heat exchanger, which is a spiral pipe. The spiral design increases the heat exchange area and improves the heat exchange efficiency. It should be noted that in other embodiments of the present invention, the second heat exchanger 122 can also be other forms of heat exchangers, and the embodiments of the present invention are not limited here.

[0125] The heating circuit includes a heater 131. The inlet of the heater 131 is connected to the second outlet of a three-way valve 112, and the outlet of the heater 131 is connected to the inlet of the first circulating pump 115. For example, the inlet of the first circulating pump 115 is connected to the return outlet E of a heating boiler 110, and the return outlet E is connected via pipes to the outlets of the second heat exchanger 122 and the heater 131. For example, the second outlet of the three-way valve 112 is connected via a pipe to the heating outlet B of the heating boiler 110, and the heating outlet B is connected via a pipe to the inlet of the heater 131. For example, the heater 131 can be a radiator or underfloor heating pipe, and is typically placed in a space requiring heating. Hot water in the first heat exchanger 111 can be delivered to the heater 131 through the second outlet of the three-way valve 112. The hot water in the heater 131 exchanges heat with the air through the heater 131, thereby raising the indoor temperature.

[0126] The controller can control the three-way valve 112 to selectively open either the first outlet or the second outlet, that is, the first outlet opens while the second outlet closes, or the first outlet closes while the second outlet opens.

[0127] For example, the first temperature sensor 123 collects the water temperature in the storage tank at a predetermined sampling frequency and uploads it to the controller. The controller receives the water temperature in the storage tank 121 returned by the first temperature sensor 123 and determines whether the water temperature in the storage tank 121 is lower than a preset first set temperature. If the water temperature in the storage tank 121 is greater than or equal to the preset first set temperature, the first outlet of the three-way valve 112 remains closed and the second outlet remains open, maintaining the original operating state of the heating water heater 110, and then returns to continue determining whether the water temperature in the storage tank 121 is lower than the preset first set temperature. If the water temperature in the storage tank 121 is lower than the preset first set temperature, the controller controls the first outlet of the three-way valve 112 to open and the second outlet to close, thus connecting the bathroom. The system heats the water in the storage tank by heating the heating circuit and then shutting off the heating circuit. It then returns to check whether the water temperature in the storage tank 121 is lower than the preset first set temperature. During the heating process, it checks whether the water temperature in the storage tank 121 is higher than the preset second set temperature. If the water temperature in the storage tank 121 is higher than the preset second set temperature, it controls the first outlet of the three-way valve 112 to close and the second outlet to open, thus connecting the heating circuit and shutting off the bathroom heating circuit. If the water temperature in the storage tank 121 is lower than or equal to the preset second set temperature, it continues to monitor the water temperature in the storage tank 121 and returns to the step of checking whether the water temperature in the storage tank 121 is higher than the preset second set temperature, until the water temperature in the storage tank 121 is higher than the preset second set temperature.

[0128] The control method for the heating hot water boiler system has been described in detail in the foregoing embodiments, and will not be repeated here in the embodiments of the present invention.

[0129] The heating hot water boiler system provided in this embodiment of the invention includes a heating hot water boiler, a bathroom heating circuit, and a heating circuit. The heating hot water boiler includes a controller, a first heat exchanger, a three-way valve, and a first circulating pump. The three-way valve is connected to the controller. The outlet of the first heat exchanger is connected to the inlet of the three-way valve. The outlet of the first circulating pump is connected to the inlet of the first heat exchanger. The bathroom heating circuit includes a water storage tank, a second heat exchanger, and a first temperature sensor. The second heat exchanger and the first temperature sensor are disposed in the water storage tank. The inlet of the second heat exchanger is connected to the first outlet of the three-way valve. The outlet of the heater is connected to the inlet of the first circulating pump, and the first temperature sensor is connected to the controller. The heating circuit includes a heater, the inlet of which is connected to the second outlet of the three-way valve, and the outlet of which is connected to the inlet of the first circulating pump. The controller obtains the water temperature in the storage tank collected by the first temperature sensor. When the water temperature in the storage tank is lower than the first temperature, the controller controls the three-way valve to open the bathroom heating circuit to heat the water in the storage tank. When the water temperature in the storage tank is higher than the second set temperature, the controller controls the three-way valve to open the heating circuit to provide heating for the user. Because the second set temperature is higher than the first set temperature, the water temperature in the tank will not drop below the first set temperature in a short period of time. Therefore, when the water temperature in the tank is higher than the second set temperature, if the user uses domestic hot water multiple times in a short period of time, the heating circuit will not switch to the bathroom heating circuit. This prevents the heating water heater from frequently switching between water usage on the bathroom side and the heating side, maintaining heating while ensuring the user's hot water comfort, thus improving the user experience. Furthermore, the fact that the heating water heater does not frequently switch between water usage on the bathroom side and the heating side when the user uses hot water frequently in a short period of time helps improve the stability of the heating water heater's operation, thereby extending the service life of the heating water heater.

[0130] In some embodiments of the present invention, such as Figure 5 As shown, the heating water boiler 110 also includes a second temperature sensor 114, which is installed on the pipe between the first heat exchanger 111 and the three-way valve 112. The second temperature sensor 114 is used to collect the outlet water temperature of the heating water boiler 110 and is connected to the controller. The second temperature sensor 114 collects the outlet water temperature of the heating water boiler 110 at a predetermined sampling frequency and uploads it to the controller.

[0131] For example, after controlling the first outlet of the three-way valve 112 to open and the second outlet to close, thus connecting the bathroom heating circuit and disconnecting the heating circuit, the outlet water temperature of the heating water boiler 110 collected by the second temperature sensor 114 is continuously monitored to determine whether the outlet water temperature of the heating water boiler is greater than the preset safe water temperature. If the outlet water temperature of the heating water boiler 110 is greater than the safe water temperature, the first outlet of the three-way valve 112 is closed and the second outlet is opened, thus connecting the heating circuit and disconnecting the bathroom heating circuit, and the system returns to determine whether the water temperature in the storage tank is less than the preset first set temperature; if the outlet water temperature of the heating water boiler 110 is less than or equal to the safe water temperature, the system returns to determine whether the water temperature in the storage tank is less than the preset first set temperature.

[0132] In some embodiments of the present invention, such as Figure 5 As shown, the bathroom heating circuit also includes a mixing pump 124, which is connected to the controller. Both the inlet and outlet of the mixing pump 124 are connected to the water storage tank 121. When the mixing pump 124 starts under the control of the controller, it agitates the water in the water storage tank 121, reducing water temperature stratification caused by poor water flow in the water storage tank 121 during heating by the second heat exchanger 122. This reduces the lag in temperature acquisition by the second temperature sensor 123.

[0133] In some embodiments of the present invention, such as Figure 5 As shown, the bathroom heating circuit is also equipped with an outlet pipe P1 and an inlet pipe P2, both of which are connected to the water storage tank 121. The outlet pipe P1 can be connected to the kitchen or bathroom faucet to provide hot water, and the inlet pipe P2 can be connected to a tap water pipe to replenish water to the water storage tank 121. In some embodiments of the present invention, the inlet pipe P2 is also connected to the cold water inlet D of the heating hot water boiler 110 via a pipe. The cold water inlet D is connected to the inlet of the first circulation pump 115, and a water replenishment valve 116 is installed on the pipe exiting the cold water inlet D. When there is insufficient water in the heating circuit, the water replenishment valve 116 can be opened to replenish water to the heating circuit through the cold water inlet D.

[0134] In some embodiments of the present invention, the heating hot water boiler system further includes a second circulation pump 140, which is connected to a controller. The outlet of the second heat exchanger 122 and the outlet of the heater 131 are both connected to the inlet of the second circulation pump 140, and the outlet of the second circulation pump 140 is connected to the inlet of the first heat exchanger 111. For example, as... Figure 5As shown, the inlet of the second circulation pump 140 is connected to the outlet of the second heat exchanger 122 and the outlet of the heater 131 via a pipe, and the outlet of the second circulation pump 140 is connected to the return port E of the heating water boiler 110 via a pipe. The second circulation pump 140 is started under the control of the controller, which can increase the water pressure in the pipe, increase the hot water supply distance and heating range.

[0135] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0136] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A control method for a combination heating and hot water boiler system, characterized by, The heating hot water boiler system includes a bathroom heating circuit and a heating circuit. The bathroom heating circuit includes a water storage tank for outputting hot water. The control method includes: Obtain the water temperature in the water storage tank that supplies hot water in the bathroom heating circuit; Determine whether the water temperature in the water storage tank is lower than a preset first set temperature; If the water temperature in the water storage tank is lower than the first set temperature, the bathroom heating circuit is turned on and the heating circuit is turned off to heat the water in the water storage tank until the water temperature in the water storage tank reaches the preset second set temperature, which is greater than the first set temperature. Determine whether the water temperature in the water storage tank is greater than or equal to the second set temperature; If the water temperature in the water tank is greater than or equal to the second set temperature, the heating circuit is turned on and the bathroom heating circuit is turned off, and the process returns to the step of determining whether the water temperature in the water tank is less than the preset first set temperature; if the water temperature in the water tank is greater than or equal to the first set temperature, the heating circuit is turned on and the bathroom heating circuit is turned off, and the process returns to the step of determining whether the water temperature in the water tank is less than the preset first set temperature. If the water temperature in the water tank is lower than the second set temperature, then return to the step of heating the water in the water tank; The control method for the heating hot water boiler system also includes: During the heating of water in the storage tank, the outlet water temperature of the heating hot water boiler is obtained, and it is determined whether the outlet water temperature of the heating hot water boiler is greater than the preset safe water temperature. If the outlet water temperature of the heating hot water boiler is greater than the safe water temperature, then the heating circuit is controlled to be turned on and the bathroom heating circuit is turned off. If the outlet water temperature of the heating hot water boiler is less than or equal to the safe water temperature and the water temperature in the storage tank is less than the second set temperature, then return to the step of heating the water in the storage tank.

2. The control method of the combination boiler system according to claim 1, wherein After controlling the heating circuit to be turned on and the bathroom heating circuit to be turned off, the following is also included: Determine whether the heating water boiler is operating in winter mode; If the heating water boiler is operating in winter mode, then determine whether the outlet water temperature of the heating water boiler is greater than or equal to the third set temperature. If the outlet water temperature of the heating hot water boiler is less than the third set temperature, the heating circuit is controlled to be turned on and the bathroom heating circuit is cut off to heat the heating water in the heating circuit until the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature. If the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature, the heating circuit is turned on and the bathroom heating circuit is cut off. The heating hot water boiler stops heating and returns to the step of judging whether the water temperature in the storage tank is less than the preset first set temperature. If the heating water boiler is not operating in winter mode, the control circuit is turned on and the bathroom heating circuit is cut off. The heating water boiler stops heating and returns to the step of determining whether the water temperature in the storage tank is lower than the preset first set temperature.

3. The control method for a heating hot water boiler system according to claim 1, characterized in that, Before controlling the heating circuit to be turned on and the bathroom heating circuit to be turned off, the following is also included: Determine whether the heating water boiler is operating in winter mode; If the heating water boiler is operating in winter mode, the heating circuit is turned on and the bathroom heating circuit is turned off, and it is determined whether the outlet water temperature of the heating water boiler is greater than or equal to the third set temperature. If the outlet water temperature of the heating hot water boiler is less than the third set temperature, the heating circuit is controlled to be turned on and the bathroom heating circuit is cut off to heat the heating water in the heating circuit until the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature. If the outlet water temperature of the heating hot water boiler is greater than or equal to the third set temperature, the heating circuit is turned on and the bathroom heating circuit is cut off. The heating hot water boiler stops heating and returns to the step of judging whether the water temperature in the storage tank is less than the preset first set temperature. If the heating water boiler is not operating in winter mode, the control circuit is turned on and the bathroom heating circuit is cut off. The heating water boiler stops heating and returns to the step of determining whether the water temperature in the storage tank is lower than the preset first set temperature.

4. The control method for a heating hot water boiler system according to claim 1, characterized in that, The first set temperature is not greater than the user-set temperature; And / or the second set temperature is not less than the user-set temperature.

5. The control method for a heating hot water boiler system according to claim 1, characterized in that, The bathroom heating circuit is equipped with a mixing water pump, the inlet and outlet of which are both connected to the water storage tank. The method further includes: During the heating of the water in the storage tank, the mixing pump is started.

6. The control method for a heating hot water boiler system according to claim 2, characterized in that, After controlling the heating water boiler to stop heating, the following is also included: Control the idling time of the circulating water pump and fan in the heating hot water boiler for a preset duration.

7. A heating hot water boiler system capable of executing the heating hot water boiler system control method according to any one of claims 1-6, characterized in that, include: A heating hot water boiler (110) includes a controller, a burner (113), a first heat exchanger (111), a three-way valve (112), and a first circulating pump (115). The three-way valve (112) is connected to the controller, the outlet of the first heat exchanger (111) is connected to the inlet of the three-way valve (112), and the outlet of the first circulating pump (115) is connected to the inlet of the first heat exchanger (111). A bathroom heating circuit includes a water storage tank (121), a second heat exchanger (122), and a first temperature sensor (123). The second heat exchanger (122) and the first temperature sensor (123) are disposed in the water storage tank (121). The inlet of the second heat exchanger (122) is connected to the first outlet of the three-way valve (112), and the outlet of the second heat exchanger (122) is connected to the inlet of the first circulating pump (115). The first temperature sensor (123) is connected to the controller. The heating circuit includes a heater (131), the inlet of which is connected to the second outlet of the three-way valve (112), and the outlet of which is connected to the inlet of the first circulating pump (115).

8. The heating hot water boiler system according to claim 7, characterized in that, The heating hot water boiler (110) also includes a second temperature sensor (114), which is installed on the pipe between the first heat exchanger (111) and the three-way valve (112) to collect the outlet water temperature of the heating hot water boiler (110). The second temperature sensor (114) is connected to the controller.

9. The heating hot water boiler system according to claim 7, characterized in that, The heating hot water boiler system also includes a second circulation pump (140), the outlet of the second heat exchanger (122) and the outlet of the heater (131) are both connected to the inlet of the second circulation pump (140), and the outlet of the second circulation pump (140) is connected to the inlet of the first circulation pump (115).

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