CN217604207U - External heating device suitable for water heater and heating system thereof - Google Patents

Abstract

The utility model discloses an external heating device suitable for a water heater and a heating system thereof, wherein the external heating device comprises a shell, a heating heat exchange module and a control module; the heating heat exchange module is arranged in the shell and comprises a plate heat exchanger, a hot water pipeline, a hot water circulation pipeline, a cold water inlet pipeline, a heating water outlet pipeline and a heating water inlet pipeline, wherein the hot water pipeline, the hot water circulation pipeline, the cold water inlet pipeline, the heating water outlet pipeline and the heating water inlet pipeline are connected with the plate heat exchanger; the control module is used for controlling the heating heat exchange module. Above-mentioned external heating device sets up and joins in marriage relevant control module through the pipeline to heating heat transfer module, makes it on the basis of water heater, for the user provides the heating efficiency, and does not influence hot-water heating system, and when winter or heating period after, need not dismantle, hot-water heating system can be according to original mode of operation.

Description

External heating device suitable for water heater and heating system thereof

Technical Field

The utility model relates to a water heater technical field, concretely relates to external heating device and heating system suitable for water heater.

Background

The water heater is a device which can increase the temperature of cold water into hot water in a certain time by various physical principles. According to different principles, the water heater can be divided into an electric water heater, a gas water heater, a solar water heater, a magnetic water heater, an air energy water heater, a heating water heater and the like. Generally, a water heater does not have a heating effect, only can provide hot water, and cannot provide indoor heating.

For the middle area, the time of winter is about 1 month colder, because low temperature environment duration is short, and the temperature is more than 0 ℃ in winter, so can not carry out central heating like north, some families probably use air conditioner heating, a small part family can use equipment such as hanging stove to carry out heating, and most of middle area's family is when the temperature is lower, do not have suitable heating equipment usually, and it is great to use air conditioner power consumption, and it is relatively poor to heat experience, to the family that leads to there is the gas, hanging stove heating effect is good, but heating function live time is not long, and the price is higher, and the volume is great. Thus, it is difficult for the middle-zone households to address the need for heating.

Patent CN209541005U discloses a heating and hot water dual-purpose electric appliance, including heater body and water heater body, through having increased the heater body promptly, make the water heater body have the heating effect, but this technique is by the combination of heater body and water heater body, only singly shifts out the heating module (being the heater body) of hanging stove, makes heating module and water heater match. Therefore, the improvement of the traditional technology is to change the hot water system of the original water heater into a heating system and add another set of heating module again. After winter or heating period, the heater body needs to be dismantled and the water heater body is reconnected with the pipelines of tap water and hot water, otherwise, the running cost of one set of equipment is increased, and the hot water cost of a user is increased.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide an external heating device suitable for water heater solves above-mentioned traditional problem, and it can provide the heating efficiency for the user on the basis of water heater, and does not influence hot-water heating system, and after winter or heating period passed, it need not dismantle, and hot-water heating system can be according to original mode of operation.

The utility model discloses a second aim at provides an adopt this external heating device's that is applicable to water heater heating system.

The utility model discloses one of the purpose adopts following technical scheme to realize:

an external heating device suitable for a water heater comprises:

the water heater comprises a shell, wherein a tap water inlet connector, a water heater outlet connector, a domestic hot water connector, a heating water outlet connector and a heating water inlet connector are arranged on the shell;

the heating heat exchange module is arranged in the shell; the heating heat exchange module comprises a plate heat exchanger, a hot water pipeline, a hot water circulation pipeline, a cold water inlet pipeline, a heating water outlet pipeline and a heating water inlet pipeline, wherein the hot water pipeline, the hot water circulation pipeline, the cold water inlet pipeline, the heating water outlet pipeline and the heating water inlet pipeline are connected with the plate heat exchanger; and

the control module is used for controlling the heating heat exchange module;

when the heating heat exchange module is not electrified, the tap water inlet interface, the cold water inlet pipeline, the hot water circulation pipeline, the hot water pipeline and the domestic hot water interface are connected with a tap water pipe, a water heater and a bathroom hot water pipe to form a hot water supply system;

when the heating heat exchange module is powered on, the water inlet interface, the hot water pipeline, the plate heat exchanger, the hot water circulation pipeline and the water outlet interface of the water heater are connected with the water heater to form a heat exchange circulation system; the heating water outlet interface, the heating water outlet pipeline, the plate type heat exchanger, the heating water inlet pipeline and the heating water inlet interface are used for being connected with heat dissipation equipment to form a heating water circulation system exchanging heat with the heat exchange circulation system.

Preferably, the plate heat exchanger is provided with a first connecting port, a second connecting port, a third connecting port and a fourth connecting port; a first control valve is arranged on the hot water pipeline, the first control valve is provided with a first control water outlet and a second control water outlet, the first control water outlet is connected with the domestic hot water interface, and the second control water outlet is connected with the first connection interface; a second control valve is arranged on the hot water circulating pipeline, the second control valve is provided with a first control water inlet and a second control water inlet, the first control water inlet is connected with the second connecting port, and the second control water inlet is connected with the cold water inlet pipeline; and a third control valve is arranged on the cold water inlet pipeline, the third control valve is provided with a third control water outlet and a fourth control water outlet, the third control water outlet is connected with the second control water inlet, and the fourth control water outlet is connected with the third connecting port.

Preferably, the first control valve, the second control valve and the third control valve are all electromagnetic directional valves.

Preferably, the fourth control water outlet is communicated with the third connecting port and the tap water inlet port to form a water supplementing system.

Preferably, the hot water pipeline is further provided with a hot water circulating pump, and the hot water circulating pump is arranged at the front end of the first control valve.

Preferably, the heating heat exchange module further comprises a water flow sensor, a heating temperature sensor and a water pressure sensor, wherein the water flow sensor is arranged between the first control valve and the domestic hot water interface; the heating temperature sensor is arranged on the heating water outlet pipeline and/or the heating water inlet pipeline; the water pressure sensor is arranged on the heating water outlet pipeline.

Preferably, a heating circulating pump is arranged on the heating water inlet pipeline and is arranged between the plate heat exchanger and the heating water inlet connector.

Preferably, the control module comprises an electric control module and a display operation module, and the electric control module is electrically connected with the display operation module.

The utility model discloses the second adopts following technical scheme to realize:

a heating system comprises a water heater, an external heating device connected with the water heater and radiating equipment connected with the external heating device, wherein the external heating device comprises the external heating device suitable for the water heater;

when the external heating device is not electrified, the external heating device is connected with the water heater to form a hot water supply system;

when the external heating device is electrified, the external heating device is connected with the water heater to form a heat exchange circulating system; the external heating device is connected with the heat dissipation equipment to form a heating water circulation system which exchanges heat with the heat exchange circulation system.

Preferably, the heat dissipation device includes an expansion tank and a radiator, and the expansion tank is disposed between the external heating device and the radiator or the expansion tank is disposed in the external heating device.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses an external heating device suitable for water heater sets up and joins in marriage relevant control module through the pipeline to heating heat transfer module, makes it on the basis of water heater, for the user provides the heating efficiency, and does not influence hot-water heating system, and after winter or heating period passed, need not dismantle, and hot-water heating system can be according to original operation mode operation.

The utility model discloses an external heating device is applicable to the user that the gas heater has been equipped with in middle part area, has the heating demand and the heating time is fine mode for the family less relatively, installs the device and corresponding heat-radiating equipment additional and just can realize the heating function, and the device both can satisfy the heating demand and also can reduce certain cost, and the volume is less relatively simultaneously.

Drawings

Fig. 1 is a schematic structural view of an external heating device according to a first embodiment of the present invention;

fig. 2 is a schematic view illustrating the connection between the external heating device shown in fig. 1 and the expansion tank and the radiator;

FIG. 3 is a schematic diagram illustrating the flow of heat supplied by the external heating device shown in FIG. 2 after the external heating device is connected to the expansion tank, the radiator and the water heater;

fig. 4 is a schematic diagram illustrating heating flow after the external heating device shown in fig. 2 is connected with an expansion tank, a radiator and a water heater;

fig. 5 is a schematic structural view of an external heating device according to a second embodiment of the present invention;

fig. 6 is a schematic structural view of an external heating device according to a third embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating the flow of heat supplied by the external heating device shown in FIG. 6 after the external heating device is connected to the expansion tank, the radiator and the water heater;

fig. 8 is a schematic diagram illustrating the heating flow after the external heating device shown in fig. 6 is connected with the expansion tank, the radiator and the water heater;

fig. 9 is a schematic structural view of an external heating device according to a fourth embodiment of the present invention;

fig. 10 is a schematic view of zero-cold water flow after the external heating device of the fifth embodiment of the present invention is connected to a water heater and a household water channel.

In the figure: 100. an external heating device; 10. a housing; 11. a tap water inlet interface; 12. a water inlet interface of the water heater; 13. a water outlet of the water heater; 14. a domestic hot water interface; 15. a heating water outlet interface; 16. a heating water inlet interface; 17. a pressure relief valve; 20. a heating heat exchange module; 21. a plate heat exchanger; 22. a hot water pipeline; 220. a hot water circulation pump; 221. a first control valve; 222. a first control water outlet; 223. a second control water outlet; 23. a hot water circulation line; 230. a second control valve; 231. a first control water inlet; 232. a second control water inlet; 24. a cold water inlet pipeline; 240. a third control valve; 241. a third water outlet control port; 242. a fourth control water outlet; 25. a heating water outlet pipeline; 26. a heating water inlet pipeline; 260. a heating circulating pump; 27. a water flow sensor; 28. a heating temperature sensor; 29. a water pressure sensor; 30. a control module; 31. an electric control module; 32. a display operation module; 40. a zero cold water temperature sensor; 41. a hot water delivery connection pipe; 42. a cold water conveying connecting pipe; 43. a one-way valve; 200. a water heater; 300. an expansion tank; 400. a heat sink.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description of the present invention, it will be understood that 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. In contrast, when an element is referred to as being "directly connected to" another element, there are no intervening elements present.

Referring to fig. 1 to 4, an external heating device 100 according to a first embodiment of the present invention is suitable for water heaters 200, such as an electric water heater 200, a gas water heater 200, a solar water heater 200, a magnetic water heater 200, an air energy water heater 200, and a heating water heater 200, and is installed on a water heater 200 and a household water path, and connected with a heat dissipation device for providing indoor heating efficacy. In the present embodiment, the water heater 200 is a gas water heater 200.

Specifically, the external heating device 100 includes a housing 10, a heating heat exchange module 20 disposed in the housing 10, and a control module 30. Understandably, the external heating device 100 can be matched with the existing heating system, and the external heating device 100 is matched with the water heater 200, so that the cost of newly purchasing heating equipment by a user is reduced.

The shell 10 is provided with a tap water inlet interface 11, a water heater inlet interface 12, a water heater outlet interface 13, a domestic hot water interface 14, a heating water outlet interface 15 and a heating water inlet interface 16, wherein the tap water inlet interface 11 is used for being connected with a tap water pipe, the water heater inlet interface 12 is used for being connected with a cold water pipe of a water heater 200, the water heater outlet interface 13 is used for being connected with a hot water pipe of the water heater 200, the domestic hot water interface 14 is used for being connected with a bathroom hot water pipe, the heating water outlet interface 15 is used for being connected with a water inlet pipe of heat dissipation equipment, and the heating water inlet interface 16 is used for being connected with a water outlet pipe of the heat dissipation equipment, so that the external heating device 100 can supply hot water and has double effects of heating after being connected with the water heater 200 and the heat dissipation equipment. Optionally, a pressure release valve 17 is installed on the heating water outlet connector 15 or the heating water inlet connector 16, and water is discharged and pressure is released when the water pressure of the heating water channel is too high. In the present embodiment, the relief valve 17 is provided on the heating water outlet port 15. In one embodiment, the tap water inlet 11, the water heater inlet 12, the water heater outlet 13, the domestic hot water inlet 14, the heating water outlet 15, or the heating water inlet 16 are, but not limited to, movable joints, threaded joints, or straight pipes, so as to facilitate installation and removal on site.

The heating heat exchange module 20 includes a plate heat exchanger 21, a hot water pipeline 22 connected to the plate heat exchanger 21, a hot water circulation pipeline 23, a cold water inlet pipeline 24, a heating water outlet pipeline 25, and a heating water inlet pipeline 26. The specific structure of the heating heat exchange module 20 is matched according to whether the water heater 200 is provided with a zero-cold water pump or is internally provided with a booster pump.

The plate heat exchanger 21 is provided with a first connecting port (namely A), a second connecting port (namely B), a third connecting port (namely C) and a fourth connecting port (namely D), the first connecting port is communicated with the second connecting port, and the third connecting port is communicated with the fourth connecting port; the hot water pipeline 22 is connected to the outlet port of the water heater 200, the domestic hot water port 14, and the plate heat exchanger 21, wherein the hot water pipeline 22 is provided with a hot water circulating pump 220 and a first control valve 221 which are sequentially arranged along the flow direction of water flow, the first control valve 221 is provided with a first control water outlet 222 and a second control water outlet 223, the first control water outlet 222 is connected to the domestic hot water port 14, and the second control water outlet 223 is connected to the first connection port of the plate heat exchanger 21. As shown in fig. 6 to 8, when the zero-cold water pump or the booster pump is installed in the water heater 200, the hot water circulating pump 220 does not need to be installed on the hot water pipeline 22, and the other structures are the same, that is, the first control valve 221 is installed on the hot water pipeline 22. The following structure and operation are similar and will not be described herein.

When the first control valve 221 is not powered on, the first control water outlet 222 is communicated with the domestic hot water interface 14, the second control water outlet 223 is not communicated with the first connection interface of the plate heat exchanger 21, when the first control valve 221 is powered on, the second control water outlet 223 is communicated with the first connection interface of the plate heat exchanger 21, the first control water outlet 222 is not communicated with the domestic hot water interface 14, and therefore when the heating heat exchange module 20 is not used, hot water directly flows out of the heating heat exchange module 20, and redundant electric quantity does not need to be used.

The hot water circulation pipeline 23 is respectively connected with the water inlet interface 12 of the water heater, the plate heat exchanger 21 and the cold water inlet pipeline 24. Wherein, the hot water circulation pipeline 23 is provided with a second control valve 230, the second control valve 230 is provided with a first control water inlet 231 and a second control water inlet 232, the first control water inlet 231 is connected with the second connecting port of the plate heat exchanger 21, and the second control water inlet 232 is connected with the cold water inlet pipeline 24.

When the second control valve 230 is not powered on, the first control water inlet 231 is not communicated with the second connecting port of the plate heat exchanger 21, the second control water inlet 232 is communicated with the cold water inlet pipeline 24, when the second control valve 230 is powered on, the first control water inlet 231 is communicated with the second connecting port of the plate heat exchanger 21, and the second control water inlet 232 is not communicated with the cold water inlet pipeline 24.

The cold water inlet pipeline 24 is respectively connected with the tap water inlet port 11, the third connection port of the plate heat exchanger 21, and the second control water inlet 232 of the hot water circulation pipeline 23. The cold water inlet pipeline 24 is provided with a third control valve 240, the third control valve 240 is provided with a third control water outlet 241 and a fourth control water outlet 242, the third control water outlet 241 is connected with the second control water inlet 232 of the hot water circulation pipeline 23, and the fourth control water outlet 242 is connected with a third connecting port of the plate heat exchanger 21.

When the third control valve 240 is not energized, the third control water outlet 241 is communicated with the second control water inlet 232 of the hot water circulation pipeline 23, the fourth control water outlet 242 is not communicated with the third connection port of the plate heat exchanger 21, when the third control valve 240 is energized, the third control water outlet 241 is not communicated with the second control water inlet 232 of the hot water circulation pipeline 23, and the fourth control water outlet 242 is communicated with the third connection port of the plate heat exchanger 21.

The heating water outlet pipeline 25 is respectively connected with the heating water outlet interface 15 and a fourth connector of the plate heat exchanger 21, and the heating water inlet pipeline 26 is respectively connected with the heating water inlet interface 16 and a third connector of the plate heat exchanger 21. Wherein, the heating water inlet pipeline 26 is provided with a heating circulating pump 260 to provide heating water circulating power for the heating water system, i.e. the heating water outlet pipeline 25, the plate heat exchanger 21, the heat sink, the heating water inlet pipeline 26 and the heating circulating pump 260 form a heating water circulating system. When the fourth control water outlet 242 of the third control valve 240 is communicated with the third connection port of the plate heat exchanger 21, tap water can be supplied to the heating water circulation system to form a water supply system.

Optionally, the first control valve 221, the second control valve 230, and the third control valve 240 are all electromagnetic directional valves.

When the cold water inlet pipeline 24 is sequentially communicated with the hot water circulating pipeline 23, the water heater 200, the hot water pipeline 22 and the domestic hot water connector 14, a hot water supply system is formed, and the hot water circulating pump 220 is additionally arranged in the hot water pipeline 22, so that the hot water circulating pump 220 can pressurize the hot water system, the water flow is increased, and the comfort of domestic hot water, particularly bathing water, is improved.

When the hot water circulation pipeline 23 is sequentially communicated with the water heater 200, the hot water pipeline 22 and the plate heat exchanger 21, a heat exchange circulation system for exchanging heat with a heating water circulation system is formed, and the hot water circulation pump 220 is a circulation power pump of the heat exchange circulation system. If a zero-cold water pump or a booster pump is installed in the water heater 200 or in the pipeline, the system can be boosted or the zero-cold water circulation can be realized by starting the zero-cold water pump or the booster pump.

In one embodiment, the heating heat exchange module 20 further includes a water flow sensor 27, a heating temperature sensor 28 and a water pressure sensor 29. The water flow sensor 27 is disposed between the first control valve 221 and the domestic hot water interface 14, and is used for detecting whether the bathroom hot water pipe is using hot water. The heating temperature sensor 28 is provided on the heating water outlet line 25 and/or the heating water inlet line 26, and is used for monitoring the temperature of the heating water. The water pressure sensor 29 is arranged on the heating water outlet pipeline 25 and used for monitoring the water pressure inside the heating water channel.

The control module 30 is used for controlling the heating heat exchange module 20, the control module 30 comprises an electric control module 31 and a display operation module 32, the electric control module 31 is connected with the display operation module 32, a first control valve 221, a second control valve 230, a third control valve 240, a hot water circulating pump 220, a heating circulating pump 260, a water flow sensor 27, a heating temperature sensor 28 and a water pressure sensor 29, and the control valve and the pump act by receiving signals of the display operation module 32 and the sensors. The display operation module 32 is disposed on the surface of the casing 10 for displaying and performing function operations, wherein the display operation module 32 is provided with a heating key, a setting key, a pressurizing key, a preheating key (if the water heater 200 includes a zero-cold water pump or a booster pump, the pressurizing key and the preheating key are not provided), a "+" key, a "-" key, and a display interface; the heating key is used for turning on and off the heating function; the setting key is used for entering and exiting the setting function of the display interface and can set the maximum time of a single cycle and the interval time of the cycle standby; the pressurizing key is used for starting and closing the domestic hot water pressurizing function; the preheating key is used for realizing a zero-cold-water function; the "+" key and the "-" key are used for adjusting the setting function of the display interface; the display interface comprises heating stopping water temperature, single circulation longest time and circulation standby interval time, and when the heating stopping water temperature is set, heating is stopped when the heating water temperature reaches the set temperature of the heating stopping water temperature; because the gas water heater 200 has the limitation of single use time, if the hot water is continuously discharged for 40min, the gas water heater can stop running and give an alarm, the phenomenon that water is forgotten to be turned off or water leakage is avoided, if the gas water heater is still required to be used, the gas water heater needs to be manually turned on again, and in order to avoid the limitation of the single use time of the gas water heater 200, the system is optimized through the setting of the maximum single cycle time and the cycle standby interval time.

In another embodiment, the external heating device 100 further includes an expansion tank 300 and a radiator 400 connected to the heating heat exchange module 20, and a user without a heating system is completed by the arrangement of the expansion tank 300 and the radiator 400. The expansion tank 300 is disposed between the heating heat exchange module 20 and the radiator 400, and has a buffering function for hot water of a heating water circulation system, when a user uses hot water and the heating system stops, the expansion tank 300 may provide flowable hot water for the radiator 400, and since a coil of the radiator 400 is small, the expansion tank 300 is disposed in front of the radiator 400, and may have a buffering function for a pressure of the system. Optionally, the radiator 400 is a floor heating or heating device. Alternatively, the expansion tank 300 may be provided at an outer end or an inner end of the case 10 as shown in the first embodiment structure of fig. 1 and the second embodiment structure of fig. 5, or the third embodiment structure of fig. 6 and the fourth embodiment structure of fig. 9.

Please refer to fig. 3, fig. 4, fig. 7 and fig. 8 again, which is another embodiment of the present invention of a heating system, the heating system includes a water heater 200, an external heating device 100 connected to the water heater 200, and a heat dissipation apparatus connected to the external heating device 100, the external heating device 100 is the external heating device 100, the heat dissipation apparatus includes an expansion tank 300 and a heat sink 400, the expansion tank 300 is disposed between the external heating device 100 and the heat sink 400 or the expansion tank 300 is disposed in the external heating device 100, hot water of the water heater 200 exchanges heat with cold water of the heat sink 400 through the external heating device 100, heated hot water after heat exchange flows into the expansion tank 300 and the heat sink 400, so as to provide heating indoors, and the control module 30 of the external heating device 100 is used for performing overall control on the existing setting of the external heating device 100 in cooperation with the water heater 200.

When the external heating device 100 is not powered on, the external heating device 100 is connected with the water heater 200 to form a hot water supply system; when the external heating device 100 is powered on, the external heating device 100 is connected with the water heater 200 to form a heat exchange circulating system; the external heating device 100 is connected with the heat dissipation apparatus to form a heating water circulation system exchanging heat with the heat exchange circulation system.

As shown in fig. 10, in order to enable the heating system to realize the zero-cold-water function, the heating heat exchange module 20 further includes a zero-cold-water temperature sensor 40 electrically connected to the electronic control module 31, and the zero-cold-water temperature sensor 40 is disposed on the hot water pipeline 22, the hot water circulation pipeline 23, or the cold water inlet pipeline 24, and is used for measuring the circulating water temperature at the water outlet or the water inlet of the hot water. In this embodiment, the zero cold water temperature sensor 40 is disposed on the outlet of the hot water line 22. If a user wants to use the preheating function in the heating heat exchange module 20, a check valve needs to be installed between the hot water pipeline 22 and the cold water pipeline of a home, so that when water flows, hot water can only flow from the hot water pipeline 22 to the cold water pipeline, that is, the heating system further comprises a zero cold water circulation system, the zero cold water circulation system comprises a water heater 200, the heating heat exchange module 20, a hot water conveying connecting pipe 41, a cold water conveying connecting pipe 42 and a tap water connecting pipe which are sequentially connected, a check valve 43 is arranged between the hot water conveying connecting pipe 41 and the cold water conveying connecting pipe 42, the hot water pipeline 22 of the heating heat exchange module 20 is respectively connected with the hot water conveying connecting pipe 41 and the water heater 200, and the tap water connecting pipe is respectively connected with the cold water conveying connecting pipe 42 and the cold water inlet pipeline 24 of the heating heat exchange module 20, so as to realize the zero cold water function.

The heating system comprises the following control modes:

1. the heating starting control mode comprises the following steps:

s1: starting a heating mode;

s2: obtaining water flow signals of bathroom water, judging whether the water flow signals exist or not, and if no water flow signals exist, judging whether the water pressure inside the warm water circulating system is greater than or equal to a water pressure preset value (P) _{Internal pressure} ≥P _{Preset of} ) When the heat exchanger is used, the heating water circulating system and the heat exchange circulating system are sequentially controlled to start circulation; otherwise, if the water flow signal exists, the heating water circulation system and the heat exchange circulation system are controlled to enter a state to be started;

s3: starting the water heater 200 and setting the outlet water temperature (T) of the water heater 200 _{Go out} ) To adjust the heating water temperature (T) of the heating water circulation system _{Heating system} )；

S4: setting heating stop water temperature (T) _Stop ) When the collected heating water temperature (T) _{Heating system} ) Greater than or equal to the heating stop water temperature (T) _Stop When) is T _{Heating system} ≥T _Stop Controlling the heat exchange circulation system to stop circulating and controlling the heating water circulation system to continue circulating, otherwise (namely T) _{Heating system} ＜T _Stop ) Controlling the heat exchange circulating system and the heating water circulating system to continue circulating;

s5: setting a single maximum run time t _{Single run} If single heating time (t) _{Single heating} ) Less than t _{Single run} When is, i.e. t _{Single heating} ＜t _{Single run} Controlling the heat exchange circulating system and the heating water circulating system to continue circulating, otherwise (namely t) _{Single heating} ≥t _{Single run} ) Sequentially controlling the heat exchange circulating system and the heating water circulating system to enter a standby state, and calculating the heating standby time (t) _{Heating standby time} ) (ii) a Wherein, t _{Single run} Less than the limit time t of the water heater 200 _{Limit for} E.g. t _{Single run} Less than t _{Limit for} -1min、t _{Single run} Less than t _{Limit for} -2min、t _{Single run} Less than t _{Limit of} -4min、t _{Single run} Less than t _{Limit for} 5min, and the like, so that the situation that the water heater 200 needs to be manually started due to the fact that the circulation time of the heat exchange circulation system is greater than or equal to the limit time of the water heater 200 is avoided;

s6: setting the heating standby starting time (t) _{Heating standby starting} ) If t is _{Heating standby starting} ≥t _{Heating standby time} When the heat exchange system is started, the heating water circulation system and the heat exchange circulation system are sequentially controlled to start circulation and enter heating heat exchange;

s7: setting the number of consecutive cycles (n) _(Continuous) ) If total cycle time of heating (t) _{Total heating time} ) Is greater than or equal to (n) _(Continuous) ×t _{Single heating} ) When is, i.e. t _{Total heating time} ≥(n _(Continuous) ×t _{Single heating} ) Sequentially controlling the heat exchange circulating systemAnd stopping circulation of the heating water circulation system and stopping heating heat exchange.

And S7, after the water heater 200 is used for a period of time, the total heating operation time can be estimated by a user, the indoor temperature can reach the required temperature after the heating is started for multiple times within the limit time of the water heater 200, the indoor heating is performed within the total heating operation time by setting the continuous cycle times, and the heating operation is stopped after the total heating operation time is reached, so that the equipment is more intelligent and convenient for the user to use. Steps S5 to S7 are directed to the water heater 200 having no zero cold water function, i.e., no zero cold water pump or a booster pump is provided inside the water heater 200, and the water heater 200 having the zero cold water function, the steps S5 to S7 need not be provided.

In one embodiment, in step S2, the starting steps of the heating water circulation system and the heat exchange circulation system are sequentially controlled as follows (this step is directed to the water heater 200 without zero cold water function): the heating circulation pump 260 is started, the first control valve 221 and the second control valve 230 are powered on, and the hot water circulation pump 220 is started, so that the heating water circulation system operates in a circulation manner before the heat exchange circulation system.

In another embodiment, in step S2, the starting steps of sequentially controlling the heating water circulation system and the heat exchange circulation system are as follows (this step is directed to the water heater 200 having the zero-cold-water function): and starting the heating circulating pump 260, electrifying the first control valve 221 and the second control valve 230 for action, and then manually starting the zero-cold-water function of the water heater, so that the heating water circulating system operates circularly before the heat exchange circulating system.

In another embodiment, in step S2, if the internal water pressure of the heating water circulation system is lower than a preset water pressure value, the water replenishing mode is started, the heating water circulation system and the heat exchange circulation system are controlled to stop starting, otherwise, the water replenishing mode is stopped; the water replenishing control mode comprises the following steps: s1: the fourth control water outlet 242 of the third control valve 240 is opened to allow tap water to flow into the heating water inlet pipe 26 through the cold water inlet pipe 24, and then to flow into the plate heat exchanger 21, the heating water outlet pipe 25, the expansion water tank 300 and the radiator 400; s2: and when the water pressure in the heating water circulation system is greater than or equal to the preset water pressure value, stopping water supplement, closing the fourth control water outlet 242 of the third control valve 240, and finishing water supplement.

2. The supercharging control mode includes the steps of: (this is water heater 200 without zero cold water function)

S1: starting a pressurization mode;

s2: and detecting the water consumption condition of the bathroom hot water, if a water flow signal is detected, controlling the hot water circulating pump 220 to start to pressurize the bathroom water, otherwise, not starting the hot water circulating pump 220.

3. The heating stop control mode includes the following steps:

s1: closing the heating module;

s2: controlling the heat exchange circulating system to stop circulating, stopping the hot water circulating pump 220 and powering off (aiming at the water heater 200 with the zero cold water function, if domestic water needs to be circularly preheated, the zero cold water function does not need to be closed, and if the domestic water does not need to be circularly preheated, the zero cold water preheating function is manually closed);

s3: the first control valve 221 and the second control valve 230 are powered off and reset (i.e., the first control water outlet 222 is communicated with the domestic hot water connector 14, and the second control water inlet 232 is communicated with the cold water inlet pipeline 24), so that hot water does not flow into the plate heat exchanger 21 any more;

s4: the heating water circulation system is controlled to stop circulation, the heating circulation pump 260 is stopped and the power is cut off (the heating circulation pump 260 is stopped at last, the temperature in the plate heat exchanger 21 can be prevented from being overhigh, and the safety of the equipment is improved);

s5: and (5) finishing heating.

4. The zero cold water circulation control mode includes the following steps (applicable to the water heater 200 without zero cold water function):

s1: starting the water heater 200 and setting the outlet water temperature (T ') of the water heater 200' _{Go out} ) To adjust the temperature of the circulating water of the zero-cold water circulating system;

s2: setting zero Cold Water stop temperature (T) _{Stopping of circulation} ) And a single maximum cycle time (t) _{Maximum cycle} ) Single cycle time (t) _{Circulation of} ) Less than the limit time t of the water heater 200 _{Limit of} Such as t _{Circulation of} Less than t _{Limit of} -1min、t _{Circulation of} Less than t _{Limit for} -2min、t _{Circulation of} Less than t _{Limit for} -4min、t _{Circulation of} Less than t _{Limit for} Starting a preheating mode for 5min or the like to obtain the outlet water temperature (T) of the heating heat exchange module 20 " _{Go out} ) And a single cycle run time (t) _{Single cycle} ) When T " _{Go out} ≥T _{Stopping of circulation} And t is _{Single cycle} ＜t _{Maximum cycle} When the time is long, the zero-cold-water circulation system is controlled to enter a standby state, and the standby time (t) of the zero-cold-water is calculated _{Zero cold water standby time} ) And zero cold water start-up times (n) _{Zero cold water} ) When T' _{Go out} ＜T _{Stopping of circulation} And t is _{Single cycle} ＜t _{Maximum cycle} If so, controlling the zero-cold water circulating system to continuously circulate and preheat; when t is _{Single cycle} ≥t _{Maximum cycle} When the water is in the water-saving state, the zero cold water circulating system is controlled to enter a standby state;

s3: setting a zero cold water standby start temperature (T) _{Standby start} ) And zero total cold water run time (t) _{Zero total time of cold water} ) When T " _{Go out} ＜T _{Standby start} And t is _{Zero total time of cold water} ＜(n _{Zero cold water} ×t _{Zero cold water standby time} ) When the temperature is higher than the preset temperature, controlling the zero-cold-water circulation system to continue circulating preheating, wherein T _{Standby start} Is T _{Stopping of circulation} -3 ℃ or T _{Stopping of circulation} -4 ℃ or T _{Stopping of circulation} -5 ℃ and so on, when t _{Zero total time of cold water} ≥(n _{Zero cold water} ×t _{Zero cold water standby time} ) And if so, controlling the zero-cold water circulating system to stop preheating.

The utility model discloses an external heating device 100 suitable for water heater 200 is through setting up and joining in marriage relevant control module 30 to the pipeline of heating heat transfer module 20, makes it on water heater 200's basis, for the user provides the heating efficiency, and does not influence hot-water heating system, and after winter or heating period passed, need not dismantle, hot-water heating system can be according to original operation mode operation.

The utility model discloses an external heating device 100 is applicable to the user that middle part area has been equipped with gas heater 200, has the heating demand and the heating time is fine mode for the family less relatively, installs the device and corresponding heat-radiating equipment additional and just can realize the heating function, and the device both can satisfy the heating demand and also can reduce certain cost, and the volume is less relatively simultaneously.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within 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 represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides an external heating device suitable for water heater which characterized in that includes:

the water heating system comprises a shell, wherein a tap water inlet interface, a water heater water outlet interface, a domestic hot water interface, a heating water outlet interface and a heating water inlet interface are arranged on the shell;

the heating heat exchange module is arranged in the shell; the heating heat exchange module comprises a plate heat exchanger, a hot water pipeline, a hot water circulation pipeline, a cold water inlet pipeline, a heating water outlet pipeline and a heating water inlet pipeline, wherein the hot water pipeline, the hot water circulation pipeline, the cold water inlet pipeline, the heating water outlet pipeline and the heating water inlet pipeline are connected with the plate heat exchanger; and

the control module is used for controlling the heating heat exchange module;

when the heating heat exchange module is not electrified, the tap water inlet interface, the cold water inlet pipeline, the hot water circulation pipeline, the hot water pipeline and the domestic hot water interface are connected with a tap water pipe, a water heater and a bathroom hot water pipe to form a hot water supply system;

when the heating heat exchange module is powered on, the water inlet interface, the hot water pipeline, the plate heat exchanger, the hot water circulation pipeline and the water outlet interface of the water heater are connected with the water heater to form a heat exchange circulation system; the heating water outlet connector, the heating water outlet pipeline, the plate type heat exchanger, the heating water inlet pipeline and the heating water inlet connector are connected with the heat dissipation equipment to form a heating water circulation system for exchanging heat with the heat exchange circulation system.

2. The external heating device suitable for the water heater according to claim 1, wherein the plate heat exchanger is provided with a first connection port, a second connection port, a third connection port and a fourth connection port; the hot water pipeline is provided with a first control valve, the first control valve is provided with a first control water outlet and a second control water outlet, the first control water outlet is connected with the domestic hot water interface, and the second control water outlet is connected with the first connection interface; a second control valve is arranged on the hot water circulating pipeline, the second control valve is provided with a first control water inlet and a second control water inlet, the first control water inlet is connected with the second connecting port, and the second control water inlet is connected with the cold water inlet pipeline; and a third control valve is arranged on the cold water inlet pipeline, the third control valve is provided with a third control water outlet and a fourth control water outlet, the third control water outlet is connected with the second control water inlet, and the fourth control water outlet is connected with the third connecting port.

3. The external heating device suitable for the water heater as defined in claim 2, wherein the first control valve, the second control valve and the third control valve are all electromagnetic directional valves.

4. The external heating device suitable for the water heater according to claim 2, wherein the fourth control water outlet is communicated with the third connector and the tap water inlet to form a water replenishing system.

5. The external heating device suitable for the water heater according to claim 2, wherein the hot water pipeline is further provided with a hot water circulating pump, and the hot water circulating pump is arranged at the front end of the first control valve.

6. The external heating device suitable for the water heater according to claim 2, wherein the heating heat exchange module further comprises a water flow sensor, a heating temperature sensor and a water pressure sensor, and the water flow sensor is arranged between the first control valve and the domestic hot water port; the heating temperature sensor is arranged on the heating water outlet pipeline and/or the heating water inlet pipeline; the water pressure sensor is arranged on the heating water outlet pipeline.

7. The external heating device suitable for the water heater according to claim 1, wherein a heating circulating pump is disposed on the heating water inlet pipeline, and the heating circulating pump is disposed between the plate heat exchanger and the heating water inlet port.

8. The external heating device suitable for the water heater according to claim 1, wherein the control module comprises an electric control module and a display operation module, and the electric control module is electrically connected with the display operation module.

9. A heating system, characterized by comprising a water heater, an external heating device connected with the water heater, and a heat sink connected with the external heating device, wherein the external heating device comprises the external heating device suitable for the water heater as claimed in any one of claims 1 to 8;

when the external heating device is not electrified, the external heating device is connected with the water heater to form a hot water supply system;

when the external heating device is electrified, the external heating device is connected with the water heater to form a heat exchange circulating system; the external heating device is connected with the heat dissipation equipment to form a heating water circulation system which exchanges heat with the heat exchange circulation system.

10. The heating system according to claim 9, wherein the heat dissipation apparatus includes an expansion tank and a radiator, and the expansion tank is disposed between the external heating device and the radiator or the expansion tank is disposed inside the external heating device.

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