CN216924756U

CN216924756U - Gas heating water heater

Info

Publication number: CN216924756U
Application number: CN202123059032.3U
Authority: CN
Inventors: 卢楚鹏; 邱振春; 徐麦建; 胡杰; 潘耀文; 梁友新
Original assignee: Guangdong Wanhe Thermal Energy Technology Co Ltd
Current assignee: Guangdong Wanhe Thermal Energy Technology Co Ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-07-08
Anticipated expiration: 2031-12-07

Abstract

The application relates to the technical field of combustion appliances, in particular to a gas heating water heater. The gas heating water heater at least comprises a heating system, a bathroom system and an auxiliary heat exchanger, wherein the heating system comprises a main heat exchanger, a first heating water return pipe and a first heating water outlet pipe, and the bathroom system comprises an electric water heater, a first bathroom water inlet pipe and a bathroom water outlet pipe. Because the heating system uses the gas to heat, and the bathroom system uses electric water heater to heat, and heating system and bathroom system all have different heating sources, can realize that warm bath is synchronous. And because the heating system and the bathroom system can exchange heat through the auxiliary heat exchanger, the heat generated when any one of the heating system and the bathroom system is operated can be utilized by the other system, and the waste of the heat is avoided.

Description

Gas heating water heater

Technical Field

The application relates to the technical field of combustion appliances, in particular to a gas heating water heater.

Background

In the related art, some gas-fired water heaters stop heating when performing bathroom heating. And other gas heating water heaters can provide bathroom hot water and heating hot water simultaneously, but its bathroom hot water temperature and heating hot water temperature not only can influence each other, and the heat that bathroom and heating produced can not obtain effectual utilization moreover, causes thermal waste.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a gas-fired water heater for heating, which can reduce the influence between the water heater and the bathroom hot water when the water heater and the bathroom hot water are used simultaneously, and can effectively utilize the heat generated by the bathroom and the heating.

The embodiment of the application provides a gas heating water heater, includes:

the heating system comprises a main heat exchanger, a first heating water return pipe and a first heating water outlet pipe, wherein the first heating water return pipe and the first heating water outlet pipe are respectively connected with the main heat exchanger;

the bathroom system comprises an electric water heater, and a first bathroom water inlet pipe and a bathroom water outlet pipe which are respectively connected with the electric water heater; and

the auxiliary heat exchanger is provided with a first water inlet end and a first water outlet end which are communicated with each other, and a second water inlet end and a second water outlet end which are communicated with each other;

the first water inlet end is connected with the first heating water outlet pipe, the first water outlet end is connected with the first heating water return pipe, the second water outlet end is connected with the first bathroom water inlet pipe, and the second water inlet end is connected with the second bathroom water inlet pipe, so that the heating system and the bathroom system exchange heat with the aid of the auxiliary heat exchanger.

Among the above-mentioned gas heating water heater, gas heating water heater includes heating system, bathroom system and assists the heat exchanger at least, and heating system includes main heat exchanger, first heating wet return and first heating outlet pipe, and bathroom system includes electric water heater, first bathroom inlet tube and bathroom outlet pipe. Because the heating system uses gas to heat, and the bathroom system uses electric water heater to heat, heating system and bathroom system all have different heating sources, can realize that warm bath is synchronous. And because the heating system and the bathroom system can exchange heat through the auxiliary heat exchanger, the heat generated when any one of the heating system and the bathroom system is operated can be utilized by the other system, and the waste of the heat is avoided.

In one embodiment, the gas-fired heating water heater further comprises a first switching device;

the first switching device is provided with a first switching port, a second switching port and a third switching port;

the first switching port is communicated with an outlet of the first heating water outlet pipe, the second switching port is communicated with an inlet of the first water inlet end, and the third switching port is communicated with an inlet of the second heating water outlet pipe;

wherein the first switching device has a first state, a second state, and a third state; the first switching device is in the first state, and the first switching port is communicated with the second switching port; the first switching device is in the second state, and the second switching port is communicated with the third switching port; the first switching device is in the third state, and the first switching port is communicated with the third switching port. Therefore, the first switching device can be used for realizing the communication between any two of the first heating water outlet pipe, the first water inlet end and the second heating water outlet pipe, the switching of three states of the first switching device can be carried out according to actual conditions, and the further effective utilization of heat generated when any one of the heating system and the bathroom system is operated is realized.

In one embodiment, a first temperature detection unit for detecting the temperature of water is arranged in the second heating water outlet pipe. Therefore, the first temperature detection unit is arranged in the second heating water outlet pipe, so that the water temperature in the second heating water outlet pipe can be obtained, and the state that the gas heating water heater is suitable for running is selected according to the water temperature, so that the heat is effectively utilized.

In one embodiment, the gas-fired heating water heater further comprises a second switching device;

the second switching device comprises a fourth switching port, a fifth switching port and a sixth switching port;

the fourth switching port is communicated with an inlet of the first heating water return pipe, the fifth switching port is communicated with an outlet of the first water outlet end, and the sixth switching port is communicated with an outlet of the second heating water return pipe;

wherein the second switching device has a fourth state, a fifth state, and a sixth state; the second switching device is in the fourth state, and the fourth switching port is communicated with the fifth switching port; the second switching device is in the fifth state, and the fifth switching port is communicated with the sixth switching port; the second switching device is in the sixth state, and the fourth switching port is communicated with the sixth switching port. So, through setting up the second auto-change over device, can realize in first heating wet return, first play water end and the second heating wet return arbitrary both's intercommunication, can carry out the switching of three kinds of states of second auto-change over device according to actual conditions, realize the further effective utilization of the heat that produces when operating arbitrary system in heating system and the bathroom system.

In one embodiment, a first water pump is arranged on the second heating water return pipe. Therefore, the running power can be supplied to the water flowing in from the second heating water return pipe, and the running requirements under different running states are met.

In one embodiment, a second water pump is arranged on the first heating water return pipe. Therefore, the running power can be supplied to the water flowing in from the first heating water return pipe, and the running requirements under different running states are met.

In one embodiment, the bypass of the second bathroom water inlet pipe is connected with a bathroom water return pipe;

and the inlet of the bathroom water return pipe is communicated with the outlet of the bathroom water outlet pipe. So, through setting up bathroom wet return to realize the circulation of bathroom water in the bathroom system, realize the function of zero cold water, also can further effectively utilize the produced heat of operation bathroom system simultaneously.

In one embodiment, a third water pump is arranged on the bathroom water return pipe. Therefore, the running power can be provided for the water flowing in from the bathroom water return pipe, and the running requirements under different running states are met.

In one embodiment, a second temperature detection unit for detecting the temperature of water is arranged in the first heating water outlet pipe. Therefore, the second temperature detection unit is arranged in the first heating water outlet pipe, so that the water temperature in the first heating water outlet pipe can be obtained, and the state that the gas heating water heater is suitable for running is selected according to the water temperature, so that the heat is effectively utilized.

In one embodiment, a third temperature detecting unit for detecting the temperature of water is arranged in the first sanitary water inlet pipe. So, through set up the third temperature detect unit in first bathroom inlet tube, can acquire the temperature in the first bathroom inlet tube to select the state that gas heating water heater is fit for the operation according to this temperature, in order to realize thermal effective utilization.

In one embodiment, a fourth temperature detection unit for detecting the water temperature is arranged on the second bathroom water inlet pipe. So, through set up fourth temperature detect unit in second bathroom inlet tube, can acquire the temperature in the second bathroom inlet tube to select the state that gas heating water heater is fit for the operation according to this temperature, in order to realize thermal effective utilization.

In one embodiment, a flow detection unit for detecting water flow is arranged on the second bathroom water inlet pipe. So, through set up flow detection unit on second bathroom inlet tube, can learn whether have rivers to flow into second bathroom inlet tube to select the state that gas heating water heater is fit for the operation, in order to realize thermal effective utilization.

Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the present application.

Drawings

Fig. 1 is a schematic structural diagram of a gas-fired heating water heater according to an embodiment of the present application.

Notation of elements for simplicity:

a heating system 100;

the main heat exchanger 110, the first heating water return pipe 120, the first heating water outlet pipe 130, the second heating water outlet pipe 140, the second heating water return pipe 150, the burner 160, the fan 170, and the expansion water tank 180;

a sanitary system 200;

the water heater 210, the water storage tank 211, the magnesium rod 212, the temperature measuring pipe 213, the heating pipe 214, the first bathroom water inlet pipe 220, the bathroom water outlet pipe 230, the second bathroom water inlet pipe 240, and the bathroom water return pipe 250;

the auxiliary heat exchanger 310, a first water inlet end 311, a first water outlet end 312, a second water inlet end 313 and a second water outlet end 314;

a first switching device 410, a first switching port 411, a second switching port 412, a third switching port 413;

a second switch 420, a fourth switch port 421, a fifth switch port 422, and a sixth switch port 423;

a first water pump 510, a second water pump 520, a third water pump 530;

a first temperature detection unit 610, a second temperature detection unit 620, a third temperature detection unit 630, and a fourth temperature detection unit 640;

a flow detection unit 710.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the present application. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. The embodiments of this application are capable of embodiments in many different forms than those described herein and those of ordinary skill in the art will recognize that many modifications may be made without departing from the spirit and scope of the present invention.

It is to be understood that the terms "first," "second," and the like as used herein may be used herein to describe various terms of art, and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features being indicated. However, these terms are not intended to be limiting unless specifically stated. These terms are only used to distinguish one term from another. For example, the first water pump, the second water pump and the third water pump are different water pumps, and the first temperature detection unit, the second temperature detection unit, the third temperature detection unit and the fourth temperature detection unit are different temperature detection units without departing from the scope of the present application. In the description of the embodiments of the present application, "a plurality" or "a plurality" means at least two, e.g., two, three, etc., unless specifically defined otherwise.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that the first feature is merely at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely below the second feature, or may simply mean that the first feature is at a lesser level than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The gas heating water heater is a kind of hot water equipment for heating indoor and providing domestic hot water. Although the gas-fired heating hot water and bathroom hot water dual-purpose heating water heater in the related art can provide heating hot water and bathroom hot water, it cannot provide heating hot water and bathroom hot water at the same time. For example, hot water cannot be supplied during heating in the bathroom, and hot water for the bathroom and hot water for heating cannot be supplied simultaneously. And other gas heating water heaters can provide bathroom hot water and heating hot water simultaneously among the correlation technique, but all heat through same heating source promptly gas, can influence each other between its bathroom hot water temperature and the heating hot water temperature, and bathroom hot water temperature and heating hot water temperature are difficult for controlling. Meanwhile, heat generated by bathroom and heating cannot be effectively utilized, and heat waste is caused.

Fig. 1 shows a schematic structural diagram of a gas-fired heating water heater according to an embodiment of the present application.

As shown in fig. 1, the present embodiment provides a gas-fired water heater, which includes a heating system 100, a sanitary system 200, and an auxiliary heat exchanger 310. The heating system 100 includes a main heat exchanger 110, and a first heating water return pipe 120 and a first heating water outlet pipe 130 connected to the main heat exchanger 110, respectively. The sanitary system 200 includes an electric water heater 210, and a first sanitary water inlet pipe 220 and a sanitary water outlet pipe 230 respectively connected to the electric water heater 210. The secondary heat exchanger 310 has a first water inlet end 311 and a first water outlet end 312 in communication with each other, and a second water inlet end 313 and a second water outlet end 314 in communication with each other. That is, the first water inlet end 311 and the first water outlet end 312 form a first fluid channel, the second water inlet end 313 and the second water outlet end 314 form a second fluid channel, and the fluid in the first fluid channel and the fluid in the second fluid channel can exchange heat. The first water inlet end 311 is connected to the first heating water outlet pipe 130, the first water outlet end 312 is connected to the first heating water return pipe 120, the second water outlet end 314 is connected to the first sanitary water inlet pipe 220, and the second water inlet end 313 is connected to the second sanitary water inlet pipe 240, so that the heating system 100 and the sanitary system 200 exchange heat with the aid of the auxiliary heat exchanger 310.

Therefore, the heating system 100 heats by using gas, the bathroom system 200 heats by using the electric water heater 210, and the heating system 100 and the bathroom system 200 have different heating sources, so that heating and bathing can be synchronized. In addition, since the heating system 100 and the sanitary system 200 can exchange heat through the auxiliary heat exchanger 310, heat generated when any one of the heating system 100 and the sanitary system 200 is operated can be utilized by the other system, thereby avoiding waste of heat.

In some embodiments, with continued reference to fig. 1, the gas-fired water heater further includes a first switching device 410. The first switching device 410 is provided with a first switching port 411, a second switching port 412 and a third switching port 413. The first switching port 411 is communicated with the outlet of the first heating outlet pipe 130, the second switching port 412 is communicated with the inlet of the first water inlet end 311, and the third switching port 413 is communicated with the inlet of the second heating outlet pipe 140. The first switching device 410 has a first state, a second state, and a third state. The first switching device 410 is in the first state, and the first switching port 411 is communicated with the second switching port 412, that is, the outlet of the first heating water outlet pipe 130 is communicated with the inlet of the first water inlet 311 of the auxiliary heat exchanger 310. In this case, the main heat exchanger 110, the first heating water outlet pipe 130, the auxiliary heat exchanger 310, and the first heating water return pipe 120 form a circulation circuit, and the sanitary system 200 can use heat generated by the heating system 100 through the auxiliary heat exchanger 310. When the first switching device 410 is in the second state, the second switching port 412 is communicated with the third switching port 413, that is, the inlet of the first water inlet 311 of the auxiliary heat exchanger 310 is communicated with the inlet of the second heating water outlet pipe 140, and the second heating water outlet pipe 140 can be connected to a device to be heated at a user end. At this time, the device to be heated at the user side performs heating using heat generated from the sanitary system 200 by the auxiliary heat exchanger 310, and electric heating is used. When the first switching device 410 is in the third state, the first switching port 411 is communicated with the third switching port 413, that is, the outlet of the first heating water outlet pipe 130 is communicated with the inlet of the second heating water outlet pipe 140, and the second heating water outlet pipe 140 can be connected to a device to be heated at a user end. At this time, the device for heating the user side directly performs heating using the main heat exchanger 110, and gas heating is used. Alternatively, the first switching device 410 may be a three-way valve, which may be used to change the fluid flow direction. In this way, by providing the first switching device 410, any two of the first heating outlet pipe 130, the first water inlet end 311, and the second heating outlet pipe 140 can be communicated with each other, and the three states of the first switching device 410 can be switched according to actual conditions, thereby further effectively utilizing heat generated when any one of the heating system 100 and the sanitary system 200 is operated.

Specifically, in some embodiments, referring to fig. 1, a first temperature detecting unit 610 for detecting a water temperature is disposed in the second heating outlet pipe 140. Thus, by arranging the first temperature detection unit 610 in the second heating water outlet pipe 140, the water temperature in the second heating water outlet pipe 140 can be obtained, and the state of the gas heating water heater suitable for operation is selected according to the water temperature, so that the effective utilization of heat is realized. For example, when the device requiring heating at the user end uses the heat generated by the bathroom system 200 through the auxiliary heat exchanger 310 to perform heating, if the water temperature obtained in the second heating outlet pipe 140 cannot meet the use requirement of the user, it indicates that the heat generated by the bathroom system 200 obtained through heat exchange at the auxiliary heat exchanger 310 cannot meet the use requirement of the user, at this time, the first switching device 410 is switched from the second state to the third state, and the electric heating mode is changed into the gas heating mode.

In some embodiments, with continued reference to fig. 1, the gas-fired water heater further includes a second switching device 420. The second switching device 420 includes a fourth switching port 421, a fifth switching port 422, and a sixth switching port 423. The fourth switching port 421 is communicated with the inlet of the first heating water return pipe 120, the fifth switching port 422 is communicated with the outlet of the first water outlet end 312, and the sixth switching port 423 is communicated with the outlet of the second heating water return pipe 150. The second switching device 420 has a fourth state, a fifth state and a sixth state. The second switching device 420 is in the fourth state, and the fourth switching port 421 and the fifth switching port 422 are communicated, that is, the inlet of the first heating water return pipe 120 is communicated with the outlet of the first water outlet end 312 of the auxiliary heat exchanger 310. In this case, the main heat exchanger 110, the first heating water outlet pipe 130, the auxiliary heat exchanger 310, and the first heating water return pipe 120 form a circulation circuit, and the sanitary system 200 can use heat generated by the heating system 100 through the auxiliary heat exchanger 310. When the second switching device 420 is in the fifth state, the fifth switching port 422 is communicated with the sixth switching port 423, that is, the outlet of the first water outlet end 312 of the auxiliary heat exchanger 310 is communicated with the outlet of the second heating water return pipe 150, and the inlet of the second heating water return pipe 150 can be communicated with the device to be heated at the user end. At this time, the device to be heated at the user side performs heating using heat generated from the sanitary system 200 by the auxiliary heat exchanger 310, and electric heating is used. The second switching device 420 is in the sixth state, and the fourth switching port 421 and the sixth switching port 423 are communicated, that is, the inlet of the first heating water return 120 is communicated with the outlet of the second heating water return 150. At this time, the device for heating the user side directly performs heating using the main heat exchanger 110, and gas heating is used. Alternatively, the second switch 420 may be a three-way valve, which may be used to change the direction of fluid flow. In this way, by providing the second switching device 420, it is possible to communicate any two of the first heating water return pipe 120, the first water outlet end 312, and the second heating water return pipe 150, and it is possible to switch the three states of the second switching device 420 according to actual conditions, thereby further effectively utilizing heat generated when any one of the heating system 100 and the bathroom system 200 is operated.

Specifically, in some embodiments, referring to fig. 1, a first water pump 510 is disposed on the second heating return pipe 150. Thus, operation power can be supplied to the water flowing in from second heating water return pipe 150, and operation requirements under different operation states can be satisfied. For example, when second switching device 420 is in the fifth state or the sixth state, second heating water return pipe 150 may be used to provide operation power to water flowing in from second heating water return pipe 150, so that water circulation in the corresponding operation state may be satisfied.

In some embodiments, referring to fig. 1, a second water pump 520 is disposed on the first heating water return pipe 120. Thus, the operation power can be provided to the water flowing in from the first heating water return pipe 120, and the operation requirements under different operation states can be met.

In some embodiments, referring to fig. 1, the bypass of the second sanitary water inlet pipe 240 is connected to a sanitary water return pipe 250, and an inlet of the sanitary water return pipe 250 is communicated with an outlet of the sanitary water outlet pipe 230. Thus, by arranging the bathroom water return pipe 250, circulation of bathroom water in the bathroom system 200 is realized, a function of zero cold water is realized, and heat generated by operating the bathroom system 200 can be further effectively utilized. In some embodiments, a third water pump 530 is disposed on the bathroom water return pipe 250. Therefore, the running power can be provided for the water flowing in from the bathroom water return pipe 250, and the running requirements under different running states can be met. For example, when the temperature of the water in the electric water heater 210 is lower than a user setting value, the third water pump 530 starts to operate to heat the sanitary system 200, so that the water in the sanitary system 200 is maintained within a certain temperature range, a function of zero cold water is realized, and the purpose of heating the sanitary water when the sanitary water is started is achieved.

In some embodiments, with continued reference to fig. 1, a second temperature detection unit 620 for detecting the temperature of water is disposed in the first heating outlet pipe 130. In this way, by providing the second temperature detection unit 620 in the first heating water outlet pipe 130, the water temperature in the first heating water outlet pipe 130 can be obtained, and the state of the gas heating water heater suitable for operation can be selected according to the water temperature, so as to effectively utilize heat.

In some embodiments, referring to fig. 1, a third temperature detecting unit 630 for detecting water temperature is disposed in the first sanitary water inlet pipe 220. Therefore, the third temperature detecting unit 630 is disposed in the first sanitary water inlet pipe 220, so that the water temperature in the first sanitary water inlet pipe 220 can be obtained, and the gas heating water heater is selected to be in a state suitable for operation according to the water temperature, so that the heat can be effectively utilized. For example, when the bathroom system 200 obtains heat generated by heating gas, if it is detected that the water temperature in the first bathroom water inlet pipe 220 cannot meet the use requirement of the user, the electric heating mode is simultaneously turned on to meet the use requirement of the user in the bathroom system 200. At this time, the circulation loop in the gas heating hot water boiler may be changed correspondingly, and specific reference may be made to the contents in some embodiments described above, which are not described herein again.

In some embodiments, referring to fig. 1, a fourth temperature detecting unit 640 for detecting the water temperature is disposed on the second sanitary water inlet pipe 240. Thus, by setting the fourth temperature detecting unit 640 in the second sanitary water inlet pipe 240, the water temperature in the second sanitary water inlet pipe 240 can be obtained, and the state of the gas heating water heater suitable for operation is selected according to the water temperature, so as to effectively utilize the heat. For example, when the bathroom system 200 obtains heat generated by heating gas, if it is detected that the water temperature in the second bathroom water inlet pipe 240 cannot meet the use requirement, the electric heating mode is simultaneously turned on to meet the requirement of the user for using the bathroom system 200. At this time, the circulation loop in the gas heating water heater may be changed correspondingly, and specific reference may be made to the contents in some embodiments described above, which is not described herein again.

In some embodiments, referring to fig. 1, the second sanitary water inlet pipe 240 is provided with a flow detection unit 710 for detecting water flow. So, through set up flow detection unit 710 on second bathroom inlet tube 240, can learn whether have rivers to flow into second bathroom inlet tube 240 to select the state that gas heating water heater is fit for the operation, with the effective utilization that realizes the heat. That is, when it is detected that water flows into the second sanitary water inlet pipe 240, some circulation pipelines on the auxiliary heat exchanger 310 may be switched according to actual conditions, and the specific switching process may refer to the contents in some embodiments described above, and will not be described herein again.

In some embodiments, continuing to refer to fig. 1, the heating system 100 further includes a burner 160 and a fan 170. Wherein the burner 160 is used to heat hot water in the main heat exchanger 110, and the fan 170 is used to discharge exhaust gas generated by the burner 160 to the outside.

In some embodiments, with continued reference to fig. 1, the electric water heater 210 includes a water storage tank 211, and a magnesium rod 212, a temperature tube 213, and a heating tube 214 disposed within the water storage tank 211. Wherein, the magnesium rod 212 is used for preventing the water storage tank 211 from being corroded, the temperature measuring tube 213 can detect the water temperature in the water storage tank 211, and the heating tube 214 is used for heating the water in the water storage tank 211.

In some embodiments, the auxiliary heat exchanger 310 is a plate heat exchanger, which can be used for heat exchange between water in the heating system 100 and water in the sanitary system 200 in the present application.

In some embodiments, continuing to refer to FIG. 1, the heating system 100 further includes an expansion tank 180. Due to the expansion and contraction of water in the heating system 100, when the hot water is heated, the volume of water in the heating system 100 increases, and when the expansion amount of the water is not contained, the water pressure in the heating system 100 increases, which affects the normal operation. The expansion tank 180 accommodates the amount of water expansion of the heating system 100, so that water pressure fluctuation of the heating system 100 due to water expansion can be reduced, and the safety and reliability of the operation of the heating system 100 can be improved. When the heating system 100 leaks water or the system is cooled down for some reason, the water level of the expansion tank 180 is lowered to replenish water to the heating system 100. The expansion tank 180 may also serve to stabilize the pressure of the heating system 100 and to remove air released by water during heating. Thus, the expansion tank 180 may be connected to the first heating return pipe 120 to accommodate the expansion amount of the system water in the heating system 100, and also to perform a constant pressure function and a water replenishing function for the heating system 100.

It should be noted that, in some embodiments, the gas-fired heating water heater further includes a controller (not shown in the drawings), and the controller can acquire the water temperature detected by each temperature detection unit and whether the flow detection unit 710 detects that water passes through, so as to control the switching of the states of each water pump and each switching device, so as to implement different circulating water paths in the gas-fired heating water heater, and effectively utilize the heat generated by each system on the premise of meeting the use requirements of users.

Therefore, the gas-fired heating water heater in the embodiment of the application has four working modes for a user to select, wherein the four working modes are respectively a heating mode, a bathroom mode, a heating-bathroom mode (i.e. a working mode for simultaneously providing heating hot water and bathroom hot water) and a zero-cold-water mode.

The four modes of operation provided in the examples of the present application are further described below with reference to the implementation of some of the foregoing examples.

Referring to fig. 1, when a user selects a heating mode, the mode has two states of gas heating and electric heating. When the gas heating is used, the first switching device 410 is in the third state, the first switching port 411 and the third switching port 413 are communicated, the second switching device 420 is in the sixth state, and the fourth switching port 421 and the sixth switching port 423 are communicated. The outlet of the first heating water outlet pipe 130 is communicated with the inlet of the second heating water outlet pipe 140, the second heating water outlet pipe 140 can be connected to a device for heating the user side, and the inlet of the first heating water return pipe 120 is communicated with the outlet of the second heating water return pipe 150. The device for heating the user side directly uses the main heat exchanger 110 to perform heating. At this time, the flow direction of the heating water is: main heat exchanger 110 → first heating outlet pipe 130 → second heating outlet pipe 140 → user side → second heating water return pipe 150 → first heating water return pipe 120 → main heat exchanger 110. When electric heating is used, the first switching device 410 is in the second state, the second switching port 412 and the third switching port 413 are communicated, the second switching device 420 is in the fifth state, and the fifth switching port 422 and the sixth switching port 423 are communicated. An inlet of the first water inlet end 311 of the auxiliary heat exchanger 310 is communicated with an inlet of the second heating water outlet pipe 140, an outlet of the first water outlet end 312 of the auxiliary heat exchanger 310 is communicated with an outlet of the second heating water return pipe 150, an inlet of the second heating water return pipe 150 is communicated with an outlet of a device required to be heated by a user side, an outlet of the second heating water outlet pipe 140 is communicated with an inlet of a device required to be heated by the user side, the second water pump 520 stops running, the first water pump 510 and the third water pump 530 run, and the device required to be heated by the user side is heated by heat generated by the bathroom system 200 through the auxiliary heat exchanger 310. At this time, the flow direction of the bathroom water is: the bathroom water return pipe 250 → the auxiliary heat exchanger 310 → the first bathroom water inlet pipe 220 → the electric water heater 210 → the bathroom water outlet pipe 230 → the bathroom water return pipe 250, and the flow direction of the heating water is: second heating water return pipe 150 → auxiliary heat exchanger 310 → second heating water outlet pipe 140 → second heating water return pipe 150.

In the heating mode, the temperature of the water in the second heating outlet pipe 140 may be detected by the first temperature detecting unit 610. If the temperature of the water in the second heating water outlet pipe 140 is detected within the preset time, the water cannot meet the use requirement of the user, the gas heating is used, and the electric heating state is turned off.

Referring to fig. 1, when the user selects the bathroom mode, the bathroom mode has three states of pure electric heating, gas heating, or dual energy heating (i.e., an operating mode of using both electric heating and gas heating). When pure electric heating is used, the heating pipe 214 in the electric water heater 210 is electrified for heating, the third water pump 530 operates, and the flow direction of the bath water is as follows: the sanitary return pipe 250 → the auxiliary heat exchanger 310 → the first sanitary inlet pipe 220 → the electric water heater 210 → the sanitary outlet pipe 230 → the sanitary return pipe 250. When the gas heating is used, the first switching device 410 is in the first state, the first switching port 411 and the second switching port 412 are communicated, the second switching device 420 is in the fourth state, and the fourth switching port 421 and the fifth switching port 422 are communicated. The outlet of the first heating water outlet pipe 130 is communicated with the inlet of the first water inlet end 311 of the auxiliary heat exchanger 310, and the inlet of the first heating water return pipe 120 is communicated with the outlet of the first water outlet end 312 of the auxiliary heat exchanger 310. The main heat exchanger 110, the first heating outlet pipe 130, the auxiliary heat exchanger 310, and the first heating return pipe 120 form a circulation loop, and the sanitary system 200 can use heat generated by the heating system 100 through the auxiliary heat exchanger 310. The flow direction of the bath water is the bath water return pipe 250 → the auxiliary heat exchanger 310 → the first bath water inlet pipe 220 → the electric water heater 210 → the bath water outlet pipe 230 → the bath water return pipe 250, and the flow direction of the heating water is: main heat exchanger 110 → first heating outlet pipe 130 → auxiliary heat exchanger 310 → first heating return pipe 120 → main heat exchanger 110. When the dual energy source is used for heating, the flow direction of the heating water and the bathroom water is consistent with that of the water heated by only using the fuel gas, the states of the water pumps and the switching devices are consistent with that of the water heated by only using the fuel gas, meanwhile, the heating pipe 214 in the electric water heater 210 is electrified for heating, and the third water pump 530 runs.

It should be noted that, in the bathroom mode, the water temperature in the first bathroom water inlet pipe 220 may be detected by the third temperature detecting unit 630, the water temperature in the second bathroom water inlet pipe 240 may be detected by the fourth temperature detecting unit 640, and the water temperature in the water storage tank 211 may be detected by the temperature measuring pipe 213, and if the water temperature of the bathroom water cannot meet the use requirement of the user within the preset time, it indicates that the use requirement of the user cannot be met only by using gas heating, and at this time, dual energy heating may be used.

Referring to fig. 1, when the user selects the heating-bath mode, the heating system 100 is heated by gas and the bath system 200 is heated by electricity, and the two systems can operate independently without affecting each other. Therefore, the situation that when the heating system 100 and the bathroom system 200 share the fuel gas for heating in the related art, the water temperatures in the two systems affect each other and the heat generated by bathroom and heating cannot be effectively utilized can be avoided.

Referring to fig. 1, when the user selects the zero cold water mode, if the water temperature in the first sanitary water inlet pipe 220 is detected by the third temperature detecting unit 630 or the water temperature in the electric water heater 210 is detected by the temperature measuring pipe 213 to be lower than the set temperature of the user, the third water pump 530 operates to heat the sanitary system 200, so that the water temperature of the sanitary water in the sanitary system 200 is maintained within a certain temperature range, and the sanitary water is heated immediately when being started. At this time, the heating manner of the bath water in the sanitary bath system 200 can refer to the contents in some embodiments described above, and will not be described herein again.

To sum up, in the embodiment of the present application, the electric energy heat source is used in the bathroom system 200, so that the heating system 100 and the bathroom system 200 respectively have independent heating sources, and the synchronous operation function of heating and bathing can be realized. Because the heating system 100 and the sanitary system 200 can exchange heat through the auxiliary heat exchanger 310, and the switching devices and the water pumps are arranged to cooperate with the pipelines in the heating system 100 and the sanitary system 200, heat generated when any one of the heating system 100 and the sanitary system 200 is operated can be utilized by the other system (for example, the sanitary system 200 can reversely heat heating water by the auxiliary heat exchanger 310), and waste of heat is avoided. Meanwhile, the bathroom water return pipe 250 is arranged in the pipeline in an auxiliary mode, and the zero-cold-water function can be achieved. Therefore, the embodiment of the application can realize off-peak electricity utilization, realize temperature rise and heat preservation, and reduce emission.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A gas heating water heater, characterized by that includes:

the heating system (100) comprises a main heat exchanger (110), and a first heating water return pipe (120) and a first heating water outlet pipe (130) which are respectively connected with the main heat exchanger (110);

the sanitary system (200), the sanitary system (200) comprises an electric water heater (210), and a first sanitary water inlet pipe (220) and a sanitary water outlet pipe (230) which are respectively connected with the electric water heater (210); and

an auxiliary heat exchanger (310), the auxiliary heat exchanger (310) having a first water inlet end (311) and a first water outlet end (312) in communication with each other, and a second water inlet end (313) and a second water outlet end (314) in communication with each other;

wherein the first water inlet end (311) is connected with the first heating water outlet pipe (130), the first water outlet end (312) is connected with the first heating water return pipe (120), the second water outlet end (314) is connected with the first bathroom water inlet pipe (220), and the second water inlet end (313) is connected with the second bathroom water inlet pipe (240), so that the heating system (100) and the bathroom system (200) exchange heat by means of the auxiliary heat exchanger (310).

2. The gas-fired heating water heater according to claim 1, further comprising a first switching device (410);

the first switching device (410) is provided with a first switching port (411), a second switching port (412) and a third switching port (413);

the first switching port (411) is communicated with an outlet of the first heating water outlet pipe (130), the second switching port (412) is communicated with an inlet of the first water inlet end (311), and the third switching port (413) is communicated with an inlet of the second heating water outlet pipe (140);

wherein the first switching device (410) has a first state, a second state and a third state; the first switching device (410) is in the first state, the first switching port (411) and the second switching port (412) are communicated; the first switching device (410) is in the second state, the second switching port (412) and the third switching port (413) are communicated; the first switching device (410) is in the third state, and the first switching port (411) and the third switching port (413) are communicated.

3. The gas-fired heating water heater according to claim 2, wherein a first temperature detection unit (610) for detecting a water temperature is provided in the second heating outlet pipe (140).

4. The gas-fired heating water heater according to claim 1, further comprising a second switching device (420);

the second switching device (420) comprises a fourth switching port (421), a fifth switching port (422) and a sixth switching port (423);

the fourth switching port (421) is communicated with an inlet of the first heating water return pipe (120), the fifth switching port (422) is communicated with an outlet of the first water outlet end (312), and the sixth switching port (423) is communicated with an outlet of the second heating water return pipe (150);

wherein the second switching device (420) has a fourth state, a fifth state and a sixth state; the second switching device (420) is in the fourth state, the fourth switching port (421) and the fifth switching port (422) are communicated; the second switching device (420) is in the fifth state, the fifth switching port (422) and the sixth switching port (423) are in communication; the second switching device (420) is in the sixth state, and the fourth switching port (421) and the sixth switching port (423) are communicated.

5. The gas-fired heating water heater according to claim 4, wherein a first water pump (510) is provided on the second heating water return pipe (150).

6. The gas-fired heating water heater according to any one of claims 1 to 5, wherein a second water pump (520) is provided on the first heating water return pipe (120).

7. The gas-fired heating water heater according to any one of claims 1 to 5, wherein the bypass of the second sanitary water inlet pipe (240) is connected to a sanitary water return pipe (250);

the inlet of the bathroom water return pipe (250) is communicated with the outlet of the bathroom water outlet pipe (230).

8. The gas-fired heating water heater as claimed in claim 7, wherein a third water pump (530) is provided on the bathroom water return pipe (250).

9. The gas-fired heating water heater according to any one of claims 1 to 5, wherein a second temperature sensing unit (620) for sensing a temperature of water is provided in the first heating outlet pipe (130).

10. The gas-fired heating water heater according to any one of claims 1 to 5, wherein a third temperature detecting unit (630) for detecting a water temperature is provided in the first sanitary water inlet pipe (220).

11. The gas-fired heating water heater according to any one of claims 1 to 5, wherein a fourth temperature detecting unit (640) for detecting a water temperature is provided on the second sanitary water inlet pipe (240).

12. The gas-fired heating water heater according to any one of claims 1 to 5, wherein a flow detection unit (710) for detecting a flow rate of water is provided on the second sanitary water inlet pipe (240).