A multi-energy domestic heating system

Abstract

This invention belongs to the technical field of residential hot water supply and discloses a multi-energy household heating system, including: a wall-mounted water tank; a multi-energy water tank comprising an upper tank and a lower tank, wherein the heat source for the upper tank and the wall-mounted water tank is a wall-mounted boiler; the heat source for the lower tank is an air-source heat pump; a flow sensor for collecting real-time hot water flow; multiple temperature sensors, respectively installed in each water tank for collecting water tank temperature; a hot water supply pipe and a cold water pipe connecting the wall-mounted water tank and the multi-energy water tank to the water usage points; and an intelligent heat exchange module including a heat loading unit, a cold water branch, and a heat exchange controller; the heat exchange controller is used to determine the system's operating mode based on the real-time hot water flow. This invention forms a combined heating system by setting up a wall-mounted water tank and a multi-energy water tank, and utilizes the intelligent heat exchange module to select the operating mode based on water consumption and frequency, effectively avoiding the problems of frequent start-up and shutdown of the wall-mounted boiler and water temperature fluctuations at the water usage points.

Description

Technical Field

[0001] This invention relates to the technical field of residential hot water supply, and specifically to a multi-energy household heating system. Background Technology

[0002] Because dual-purpose gas-fired wall-hung boilers can simultaneously meet users' needs for both domestic hot water and heating, their usage in the market is constantly increasing, and their market share is also rising.

[0003] Hot water flows directly from the domestic hot water outlet of a dual-purpose gas boiler (heating and bathing) to the domestic water points, which is the most common practice in the market. For villas or larger areas, a large floor-standing water tank is used (in very rare cases). To ensure the domestic hot water function of the boiler is on, the circulation pump between the water tank and the boiler is manually started, pre-filling the large water tank with hot water. When the hot water in the tank is used up, the circulation pump is manually started again to reheat the tank, and this cycle repeats. This solves the problem of water temperature fluctuations at the water points, but it has several drawbacks: 1. The large floor-standing water tank, piping, circulation pump, and controller create a complex and messy system connection; 2. The large water tank has a large residual heat capacity and a large heat dissipation surface, resulting in energy waste; 3. The lifespan of the controller and pump is easily affected by external moisture; 4. Because the water tank only has one temperature probe, frequent starting and stopping of water points leads to frequent starting and stopping of the gas boiler, severely impacting its lifespan; 5. When using water continuously, the conventional water tank uses coil heat exchange, which has low heat exchange efficiency and cannot continuously supply hot water. This seriously affects users' hot water experience, and in some cases, there is even a risk of scalding.

[0004] In summary, there is a need to design a multi-energy household heating system to solve the aforementioned problems in the existing technology. Summary of the Invention

[0005] This invention provides a multi-energy household heating system that solves the problems of frequent start-stop of wall-hung boilers and water temperature fluctuations at water points.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-energy household heating system, comprising:

[0008] The wall-mounted water tank has its hot water inlet connected to the hot water outlet of the wall-mounted boiler;

[0009] A multi-energy water tank includes an upper tank and a lower tank, wherein the heat source of the upper tank is a wall-mounted boiler and the heat source of the lower tank is an air source heat pump;

[0010] The hot water outlets of the wall-mounted water tank and the multi-energy water tank are connected to the water usage points via hot water supply pipes; the hot water return ports of the wall-mounted water tank and the multi-energy water tank are connected to the water usage points via cold water pipes.

[0011] A flow sensor, installed at the point of water use, is used to collect real-time hot water flow rate;

[0012] Temperature sensors are installed in each water tank to collect the water tank temperature;

[0013] The intelligent heat exchange module includes a heat loading unit, a zero-cold-water branch, and a heat exchange controller; the upper tank exchanges heat with the wall-hung boiler through the heat loading unit; one end of the zero-cold-water branch is connected to the water point, and the other end is connected to the zero-cold-water return inlet of the upper tank and the zero-cold-water return inlet of the lower tank through an electric three-way valve; the heat exchange controller is used to determine the operating mode of the system based on the real-time hot water flow rate.

[0014] The heat loading unit includes a primary side branch, a secondary side branch, and a plate heat exchange unit;

[0015] The primary side branch includes a first inlet, a first outlet, a heat source pump, and a heat source temperature probe; the first inlet is connected to the heating hot water outlet of the wall-hung boiler; the first outlet is connected to the heating hot water return port of the wall-hung boiler; the heat source pump and the heat source temperature probe are located between the first inlet and the plate heat exchange unit.

[0016] The secondary side branch includes a second inlet, a second outlet, a heat loading pump, and a heat loading temperature probe; the second inlet is connected to the heat loading outlet of the upper tank; the second outlet is connected to the heat loading inlet of the upper tank; the heat loading pump is located between the second inlet and the plate heat exchange unit; the heat loading temperature probe is located between the second outlet and the plate heat exchange unit.

[0017] In some embodiments of the present invention, when the upper tank is used as the hot water source for the water point; if the water temperature at the top of the upper tank is lower than a set value -a℃, the heat exchange controller controls the heat source pump to start, and the hot water in the primary side branch circulates; when the real-time temperature collected by the heat source temperature probe reaches the set value, the heat exchange controller controls the heat loading pump to start, and the hot water in the secondary side branch circulates.

[0018] In some embodiments of the present invention, when the upper tank is used as the hot water source for the water point; if the water temperature at the bottom of the upper tank is higher than a set value, the heat exchange controller controls the heat source pump to shut down, and the hot water in the primary side branch stops circulating; when the real-time temperature collected by the heat source temperature probe reaches the set value + a℃, the heat exchange controller controls the heat loading pump to shut down, and the hot water in the secondary side branch stops circulating.

[0019] In some embodiments of the present invention, the heat loading pump is a variable frequency pump. During the operation of the heat loading pump, the heat exchange controller is used to adjust the speed of the heat loading pump in real time according to the set value and the temperature value collected by the heat loading temperature probe to ensure that the temperature value collected by the heat loading temperature probe is equal to the set value.

[0020] In some embodiments of the present invention, the operating modes include new energy mode, low flow mode, high flow mode and linkage mode.

[0021] In some embodiments of the present invention, when the real-time hot water flow rate is less than αL / min, the system operates in a low-flow mode, and the intelligent heat exchange module controls the wall-mounted water tank as the hot water source for the water point; when the real-time hot water flow rate is within the range of [αL / min, βL / min], the system operates in a high-flow mode, and the intelligent heat exchange module controls the upper tank as the hot water source for the water point; when the real-time hot water flow rate is greater than βL / min, the system operates in a linkage mode, and the intelligent heat exchange module controls the wall-mounted water tank and the upper tank to alternately serve as the hot water source for the water point.

[0022] In some embodiments of the present invention, in the linkage mode, the intelligent heat exchange module is provided with a mode start value. When the real-time hot water flow rate is less than the mode start value, the wall-mounted water tank is started first for heating; when the real-time hot water flow rate is greater than the mode start value, the upper tank is started first for heating.

[0023] In some embodiments of the present invention, when the new energy mode is running in priority, the intelligent heat exchange module is used to control the hot water source of the lower tank as the water point, and when the water tank temperature of the lower tank is lower than the set value, the system operation mode is switched to low flow mode, high flow mode or linkage mode according to the real-time hot water flow.

[0024] When the new energy mode is not prioritized, the intelligent heat exchange module is used to determine the system's operating mode as low flow mode, high flow mode, or linkage mode based on the real-time hot water flow rate, and at the same time control the lower tank to be the preheating source for the wall-mounted water tank and the upper tank.

[0025] In some embodiments of the present invention, the hot water supply pipe is provided with a first electric three-way valve and a second electric three-way valve; the first outlet of the first electric three-way valve is connected to the water point, the first inlet is connected to the hot water outlet of the upper tank, and the second inlet is connected to the hot water outlet of the wall-mounted water tank; the second outlet of the second electric three-way valve is connected to the water point, the third outlet is connected to the preheated hot water inlet of the upper tank, and the third inlet is connected to the hot water outlet of the lower tank.

[0026] In some embodiments of the present invention, the zero-cold water pipe is provided with a third electric three-way valve, the fourth outlet of the third electric three-way valve is connected to the zero-cold water return port of the upper tank, the fifth outlet is connected to the zero-cold water return port of the lower tank, and the fourth inlet is connected to the zero-cold water branch.

[0027] The technical solution of the present invention has the following technical effects compared with the prior art:

[0028] This invention forms a combined heating system by setting up a wall-mounted water tank and a multi-energy water tank. It utilizes an intelligent heat exchange module to select different operating modes based on water consumption and frequency, effectively avoiding the problem of frequent start-up and shutdown of the wall-mounted boiler. Furthermore, the wall-mounted water tank and the multi-energy water tank can be connected to different water points to ensure a constant temperature of the hot water flowing out, thus avoiding water temperature fluctuations at the water points.

[0029] The system can save energy by using an air source heat pump to preheat tap water in low flow mode, high flow mode and linkage mode, and can reduce costs even more significantly in new energy mode. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a multi-energy household heating system shown in Example 1.

[0032] Figure 2 This is a schematic diagram of hot water circulation in the low flow mode shown in Example 1.

[0033] Figure 3 This is a schematic diagram of the hot water circulation under the high flow rate mode shown in Example 1.

[0034] Figure 4 This is a schematic diagram of the hot water circulation under the new energy mode shown in Example 1.

[0035] Figure 5 This is a schematic diagram of a multi-energy household heating system shown in Example 2.

[0036] Figure 6 The diagram shows the structure of the multi-energy water tank in each embodiment.

[0037] Figure 7 The diagram below shows the structure of the intelligent heat exchange module as illustrated in each embodiment.

[0038] Reference numerals: 100, wall-hung boiler; 200, wall-hung water tank; 210, first zero-cold water pump; 220, pumping station; 230, pumping station controller; 240, water pump;

[0039] 300. Multi-energy water tank; 310. Upper tank; 311. Heat loading inlet; 312. Heat loading outlet; 313. Upper tank zero cold water return inlet; 314. Preheated water inlet; 315. Hot water outlet; 320. Lower tank; 321. Lower tank hot water outlet; 322. Lower tank zero cold water return inlet; 323. Cold water inlet; 330. Air source heat pump;

[0040] 400 Intelligent heat exchange module; 410 Primary side branch; 411 Heat source pump; 412 Heat source temperature probe; 413 First water inlet; 414 First water outlet; 420 Secondary side branch; 421 Heat loading pump; 422 Heat loading temperature probe; 423 Second water inlet; 424 Second water outlet; 430 Zero cold water branch; 431 Second zero cold water pump; 440 Heat exchange controller; 450 Third branch; 460 Plate heat exchange unit;

[0041] 510, First electric three-way valve; 520, Second electric three-way valve; 530, Third electric three-way valve; 610, First temperature sensor; 620, Second temperature sensor; 630, Third temperature sensor; 640, Fourth temperature sensor; 700, Flow sensor; 800, Water usage point. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0044] Example 1, Reference Figure 1 As shown, a multi-energy household heating system includes:

[0045] The wall-mounted water tank 200 has its hot water inlet connected to the hot water outlet of the wall-mounted boiler 100;

[0046] The multi-energy water tank 300 includes an upper tank 310 and a lower tank 320. The heat source of the upper tank 310 is a wall-mounted boiler 100; the heat source of the lower tank 320 is an air source heat pump 330; the hot water outlets of the wall-mounted water tank 200 and the multi-energy water tank 300 are connected to the water point 800 through a hot water supply pipe; the hot water return ports of the wall-mounted water tank 200 and the multi-energy water tank 300 are connected to the water point 800 through a cold water pipe.

[0047] A flow sensor 700 is installed at the water point 800 to collect real-time hot water flow.

[0048] Multiple temperature sensors are installed in each water tank to collect the water tank temperature. In this embodiment, the upper tank 310 is equipped with a first temperature sensor 610 and a second temperature sensor 620 to collect the upper water temperature T1 and the lower water temperature T2 of the upper tank 310, respectively. The lower tank 320 is equipped with a third temperature sensor 630 to collect the lower water temperature T3. Since the wall-hung boiler 100 in this embodiment is a dual-purpose gas wall-hung boiler for heating and bathing, it is equipped with a heating hot water outlet, a heating hot water return outlet, a domestic hot water outlet, and a domestic hot water return outlet. Therefore, a fourth temperature sensor 640 is installed on the hot water outlet of its heating pipe to collect the heating water temperature T4.

[0049] Intelligent heat exchange module 400, refer to Figure 7 As shown, it includes a heat loading unit, a zero-cold-water branch 430, and a heat exchange controller 440. The upper tank 310 exchanges heat with the wall-mounted boiler 100 through the heat loading unit. One end of the zero-cold-water branch 430 is connected to the water point 800, and the other end is connected to the upper tank zero-cold-water return port 313 and the lower tank zero-cold-water return port 322 through an electric three-way valve. The heat exchange controller 440 is used to control the start and stop of the heat loading unit and the opening and closing of the electric three-way valve according to the real-time hot water flow and water tank temperature. In addition, the functions of the intelligent heat exchange module 400 involved in the heating process of the wall-mounted water tank 200 are also implemented by the heat exchange controller 440.

[0050] For the aforementioned hot-loading unit, continue to refer to... Figure 7 As shown, it includes a primary side branch 410, a secondary side branch 420, and a plate heat exchange unit 460;

[0051] The primary side branch 410 includes a first inlet 413, a first outlet 414, a heat source pump 411, and a heat source temperature probe 412; the first inlet 413 is connected to the heating hot water outlet of the wall-hung boiler 100; the first outlet 414 is connected to the heating hot water return port of the wall-hung boiler 100; the heat source pump 411 and the heat source temperature probe 412 are located between the first inlet 413 and the plate heat exchange unit 460;

[0052] The secondary side branch 420 includes a second inlet 423, a second outlet 424, a heat loading pump 421, and a heat loading temperature probe 422; the second inlet 423 is connected to the heat loading outlet 312 of the upper tank 310; the second outlet 424 is connected to the heat loading inlet 311 of the upper tank 310; the heat loading pump 421 is located between the second inlet 423 and the plate heat exchange unit 460; the heat loading temperature probe 422 is located between the second outlet 424 and the plate heat exchange unit 460.

[0053] The heat source pump 411 and the heat loading pump 421 are used to transfer hot water from the wall-hung boiler 100 and the upper tank 310 to the plate heat exchange unit 460 for heat exchange, thereby heating the upper tank 310. The heat source temperature probe 412 is used to collect the water temperature before it enters the plate heat exchange unit 460 on the primary side branch 410, and the heat loading temperature probe 422 is used to collect the water temperature after it flows out of the plate heat exchange unit 460 on the secondary side branch 420. The heat exchange controller 440 can determine the start and stop times of the heat source pump 411 and the heat loading pump 421 based on the two water temperatures it collects.

[0054] The heat loading unit also includes a third branch 450, which is used to output hot water from the upper tank 310 to the water point 800. The inlet of the third branch 450 is connected to the hot water outlet 315 located in the upper tank 310, and the outlet of the third branch 450 is connected to the water point 800 through a first electric three-way valve 510. Specifically, the outlet of the third branch 450 is connected to the first inlet of the first electric three-way valve 510.

[0055] The heat exchange controller 440 is communicatively connected to each electric three-way valve, the flow sensor 700, and the temperature sensor to receive the real-time hot water flow and the water tank temperature. The heat exchange controller 440 is also used to determine the system's operating mode based on the real-time hot water flow and to control the on / off state of the electric three-way valves according to the operating mode.

[0056] Regarding the installation location of the electric three-way valve, the hot water supply pipe is equipped with a first electric three-way valve 510 and a second electric three-way valve 520; the first outlet of the first electric three-way valve 510 is connected to the water point 800, the first inlet is connected to the hot water outlet 315 of the upper tank 310, and the second inlet is connected to the hot water outlet of the wall-mounted water tank 200; the second outlet of the second electric three-way valve 520 is connected to the water point 800, the third outlet is connected to the preheated hot water inlet 314 of the upper tank 310, and the third inlet is connected to the lower tank hot water outlet 321 of the lower tank 320.

[0057] A third electric three-way valve 530 is installed in the zero cold water pipe. The fourth outlet of the third electric three-way valve 530 is connected to the zero cold water return port 313 of the upper tank, and the fifth outlet is connected to the zero cold water return port 322 of the lower tank.

[0058] In some embodiments of this application, for the multi-energy water tank 300, refer to Figure 6 As shown, the multi-energy water tank 300 includes an upper tank 310 and a lower tank 320, with the water capacity of the upper tank 310 being greater than that of the lower tank 320.

[0059] The upper tank 310 has a heat loading inlet 311 at the top for receiving hot water after heat exchange with the wall-hung boiler 100; a hot water outlet 315 at the top for outputting to the water point 800; and a heat loading outlet 312 at the bottom for heat exchange with the wall-hung boiler 100, an upper tank cold water return inlet 313, and a preheated hot water inlet 314.

[0060] The lower tank 320 has a hot water outlet 321 at its upper part, which is connected to the preheating hot water inlet 314 of the upper tank and the preheating hot water inlet at the bottom of the wall-mounted water tank 200 through the second electric three-way valve 520. The lower tank 320 has a cold water inlet 323 at its bottom, which can be connected to the tap water side. The lower part of the lower tank 320 has a cold water return outlet 322.

[0061] In some embodiments of this application, the operating modes include new energy mode, low flow mode, high flow mode, and linkage mode.

[0062] Specifically, when the real-time hot water flow rate is less than αL / min, the system operates in low-flow mode, and the intelligent heat exchange module 400 controls the wall-mounted water tank 200 as the hot water source for water point 800; when the real-time hot water flow rate is within the range of [αL / min, βL / min], the system operates in high-flow mode, and the intelligent heat exchange module 400 controls the upper tank 310 as the hot water source for water point 800; when the real-time hot water flow rate is greater than βL / min, the system operates in linkage mode, and the intelligent heat exchange module 400 controls the wall-mounted water tank 200 and the upper tank 310 to alternately serve as the hot water source for water point 800.

[0063] For example, α can be 10 and β can be 20. This means that when the real-time hot water flow rate is less than 10L / min, indicating fewer users at water point 800, the system operates in low-flow mode; only the wall-mounted water tank 200 provides heating, resulting in minimal heat loss and continuous constant-temperature water supply. When the real-time hot water flow rate is within the range of [10L / min, 20L / min], indicating more users at water point 800, the system operates in high-flow mode; only the upper tank 310 provides heating, maintaining constant-temperature water supply for the same duration. When the real-time hot water flow rate is greater than 20L / min, indicating more users at water point 800, the system operates in linkage mode; in this mode, the wall-mounted water tank 200 and the upper tank 310 alternately provide heating, achieving a larger continuous water supply.

[0064] In some embodiments of the present invention, when the water flow rate at water point 800 is less than α L / min, for example less than 10 L / min, refer to Figure 2 As shown, the intelligent heat exchange module 400 control system operates in low flow mode.

[0065] Specifically, the intelligent heat exchange module 400 communicates with the pump station controller 230. The pump station controller 230 starts the pump station 220. At the same time, the intelligent heat exchange module 400 controls the first inlet of the first electric three-way valve 510 to close and the second inlet to open, that is, only the wall-mounted water tank 200 provides heating. The intelligent heat exchange module 400 controls the second outlet of the second electric three-way valve 520 to close and the third outlet to open. The preheated water in the lower tank 320 enters the wall-mounted boiler 100 for heating through the pump station 220 and then enters the wall-mounted water tank 200.

[0066] In some embodiments of the present invention, the zero-cold-water operation principle of the wall-mounted water tank 200 and the wall-mounted boiler 100 is as follows:

[0067] The system uses the heat source within the wall-mounted water tank 200 as the circulating heat source for its zero-cold water system. When the pump station controller 230 detects that the water temperature in the zero-cold water pipe is lower than the set value, it starts the first zero-cold water pump 210 in the wall-mounted water tank 200. Hot water from the wall-mounted water tank 200 flows out from the hot water outlet of the wall-mounted water tank 200 to the water point 800, and then returns to the bottom water outlet of the wall-mounted water tank 200 through the zero-cold water pipe at the water point 800. When the pump station controller 230 detects that the water temperature in the zero-cold water pipe is higher than the set value, it shuts off the first zero-cold water pump 210, ending the zero-cold water circulation and ensuring that hot water is available immediately upon opening the valve at the water point 800.

[0068] When water is used at point 800, the heating process of the wall-mounted water tank 200 is as follows:

[0069] When the upper water temperature of the wall-mounted water tank 200 is lower than the set value (the set value is obtained based on the average of the upper and lower water temperatures of the wall-mounted water tank 200), the wall-mounted water tank 200 starts heating while water is being used: In the first case, when the water consumption at water point 800 is small, the water preheated by the air source heat pump 330 in the lower tank 320 flows through the pump station 220 and the wall-mounted boiler 100, absorbs heat, and returns to the wall-mounted water tank 200 through the hot water inlet. In this way, the hot water in the wall-mounted water tank 200 will increase until the wall-mounted water tank 200 finishes heating. In the second scenario, when the water consumption at point 800 is high (a rare extreme case that generally does not occur), the water preheated by the air source heat pump 330 in the lower tank 320 flows through the pump station 220 and then splits into two paths. One path flows through the wall-mounted boiler 100 to absorb heat and then returns to the wall-mounted water tank 200 through the hot water inlet. The other path enters the wall-mounted water tank 200 through the bottom water outlet. The amount of hot water in the wall-mounted water tank 200 will gradually decrease.

[0070] In some embodiments of the present invention, when the water flow rate at water point 800 is in the range of [αL / min, βL / min], for example, in the range of [10L / min, 20L / min]; refer to Figure 3 As shown, the intelligent heat exchange module 400 control system operates in high flow mode.

[0071] Specifically, the intelligent heat exchange module 400 controls the first inlet of the first electric three-way valve 510 to open and the second inlet to close, meaning that only the upper tank 310 is heated; the intelligent heat exchange module 400 controls the second outlet of the second electric three-way valve 520 to close and the third outlet to open, so that the preheated water in the lower tank 320 enters the upper tank 310 through the second electric three-way valve 520.

[0072] In some embodiments of the present invention, reference continues to be made to... Figure 3 As shown, in high flow mode, when only the upper tank 310 is used as the hot water source for water point 800, the heat exchange controller 440 receives the upper water temperature T1 and lower water temperature T2 of the upper tank 310 in real time.

[0073] In some embodiments of this application, the set value is the average of the upper water temperature T1 and the lower water temperature T2 of the upper tank 310; this set value is built into the heat exchange controller 440 and provides a data standard for subsequent mode switching of the heat exchange controller 440.

[0074] If the upper water temperature T1 of the upper tank 310 is lower than the set value -a℃ (for example, when the set value is 50℃, the heat exchange controller 440 detects that the upper water temperature T1 of the upper tank 310 is less than 45℃), and when the heating water temperature T4 reaches the set value of 50℃, the heat exchange controller 440 controls the heat source pump 411 to start, and the hot water in the primary side branch 410 circulates; when the real-time temperature collected by the heat source temperature probe 412 reaches the set value (when the real-time temperature collected by the heat source temperature probe 412 reaches 50℃), the heat exchange controller 440 controls the heat loading pump 421 to start, and the hot water in the secondary side branch 420 circulates. At this time, the hot water in the secondary side branch 420 and the hot water in the primary side branch 410 exchange heat in the plate heat exchange unit 460 to achieve heating of the upper tank 310.

[0075] When the water temperature T2 at the bottom of the upper tank 310 is higher than the set value (for example, when the set value is 50℃, the heat exchange controller 440 detects that the water temperature T2 at the bottom of the upper tank 310 is higher than 50℃), the heat exchange controller 440 controls the heat source pump 411 to shut down, and the hot water in the primary side branch 410 stops circulating; when the real-time temperature collected by the heat source temperature probe 412 reaches the set value + a℃ (when the real-time temperature collected by the heat source temperature probe 412 reaches 55℃), the heat exchange controller 440 controls the heat loading pump 421 to shut down, and the hot water in the secondary side branch 420 stops circulating.

[0076] Specifically, during the process of the upper tank 310 stopping heat exchange, a period of time is set in which only the heat loading pump 421 runs, which is the plate heat exchanger unloading process. This period of time can effectively prevent the plate heat exchanger from scaling at high temperatures.

[0077] In some embodiments of the present invention, the heat loading pump 421 is a variable frequency pump. During the operation of the heat loading pump 421, the heat exchange controller 440 adjusts the rotation speed of the heat loading pump 421 in real time according to the set value and the temperature value collected by the heat loading temperature probe 422 to ensure that the temperature value collected by the heat loading temperature probe 422 is equal to the set value. This reduces the heat exchange cycle frequency, ensures the heat exchange efficiency of the upper tank 310, and the upper tank 310 completes heating in one cycle without multiple cycles.

[0078] In some embodiments of the present invention, in high-flow mode, the heat source inside the upper tank 310 of the system's zero-cold water system is used as the circulating heat source. When the heat exchange controller 440 detects that the water temperature in the zero-cold water pipe is lower than the set value, it starts the second zero-cold water pump 431 installed on the zero-cold water branch 430. The hot water in the upper tank 310 flows out from the hot water outlet 315 to the water point 800, and then flows from the zero-cold water pipe of the water point 800 through the zero-cold water branch 430 and the fourth outlet of the third electric three-way valve 530 back to the upper tank's zero-cold water return port 313. The fifth outlet of the third electric three-way valve 530 is in the closed state. When the heat exchange controller 440 detects that the water temperature in the zero-cold water pipe is higher than the set value, it shuts down the second zero-cold water pump 431, and the zero-cold water circulation ends, ensuring that hot water is available immediately when the valve is opened at the water point 800.

[0079] In some embodiments of the present invention, reference is made to... Figure 1 As shown, in the linkage mode, when there are many users, such as water point 800 with a water flow rate greater than 20L / min, the wall-mounted water tank 200 and the upper tank 310 alternate heating, which can provide more hot water.

[0080] To determine the water supply sequence between the wall-mounted water tank 200 and the upper tank 310, the intelligent heat exchange module 400 is equipped with a mode start value, which in this embodiment is 10L / min. When the real-time hot water flow rate is less than 10L / min, the wall-mounted water tank 200 is activated first for heating; when the real-time hot water flow rate is greater than 10L / min, the upper tank 310 is activated first for heating.

[0081] Specifically, when the wall-mounted water tank 200 is supplying heat, the heat exchange controller 440 operates in low-flow mode. Then, the pump station controller 230 collects the water temperature of the wall-mounted water tank 200. If the water temperature at the top of the wall-mounted water tank 200 is lower than the set value, the pump station controller 230 sends a signal to the heat exchange controller 440, which then switches its operating mode to high-flow mode, and the upper tank 310 begins supplying heat.

[0082] During the heating process of the upper tank 310, the pump station controller 230 starts the pump station 220 of the wall-mounted water tank 200 to realize the heating of the wall-mounted water tank 200 by the wall-mounted boiler 100.

[0083] When the water temperature T1 at the top of the upper tank 310 is lower than the set value, the wall-mounted water tank 200 has also completed heating. The heat exchange controller 440 then switches to low flow mode, that is, the wall-mounted water tank 200 supplies heat, and so on.

[0084] In some embodiments of the present invention, in the linkage mode, the operation of the zero cold water depends on the water supply tank. When using the wall-mounted water tank 200, the judgment program of the zero cold water pump in the pump station controller 230 is used. When using the upper tank 310 for water supply, the judgment program of the zero cold water pump in the heat exchange controller 440 is used.

[0085] In some embodiments of the present invention, reference is made to... Figure 4 As shown, in the new energy mode, the lower tank 320 of the multi-energy water tank 300 serves as the water source. That is, only the air source heat pump 330 is used for heating, and the wall-mounted boiler 100 is no longer used to provide hot water, resulting in greater energy savings.

[0086] Specifically, the heat exchange controller 440 controls the second outlet of the second electric three-way valve 520 to open and the third outlet to close, meaning that the hot water from the lower tank 320 is supplied to the water point 800 via the second outlet of the second electric three-way valve 520; preheating water is no longer supplied to the upper tank 310 and the wall-mounted water tank 200. Simultaneously, the fourth outlet of the third electric three-way valve 530 is closed and the fifth outlet is open, meaning that the cold water from the water point 800 returns to the cold water return port 322 of the lower tank via the cold water branch 430 and the fifth outlet of the third electric three-way valve 530; the fourth outlet of the third electric three-way valve 530 is closed, thus completing the hot water supply circuit.

[0087] The air source heat pump 330 operates automatically based on the water temperature collected by the third temperature sensor 630.

[0088] In some embodiments of this application, the intelligent control module 400 is used to set the system's operating mode. When the new energy mode is in priority operation, the intelligent heat exchange module 400 is used to control the lower tank 320 as the hot water source for the water usage point, and when the water temperature T3 in the lower tank is lower than the set value, the system's operating mode is switched to low flow mode, high flow mode, or linkage mode according to the real-time hot water flow rate.

[0089] When the new energy mode is not prioritized, the intelligent heat exchange module 400 is used to determine the system's operating mode as low flow mode, high flow mode, or linkage mode based on the real-time hot water flow rate, and at the same time controls the lower tank 320 to be the preheating source for the wall-mounted water tank 200 and the upper tank 310.

[0090] In some embodiments of this application, for the new energy mode, the user can set whether to prioritize the operation of the new energy mode in the intelligent heat exchange module 400 according to water demand. In the new energy mode, only the lower tank 320 serves as the hot water source for the water point 800.

[0091] Example 2, refer to Figure 5 As shown, in this embodiment, the wall-mounted water tank 200 no longer has an external pump station 220 and pump station controller 230. Instead, the input of preheated hot water and zero-cold water return is achieved through a water pump 240 installed inside the wall-mounted water tank 200. During the heating process of the wall-mounted water tank 200, the water tank temperature collected by the temperature probe located in the wall-mounted water tank 200 is sent to the heat exchange controller 440. The heating and hot water supply processes of the wall-mounted water tank 200 are both controlled by the heat exchange controller 440.

[0092] In some embodiments of the present invention, the operating principles of the wall-mounted water tank 200 and the wall-mounted boiler 100 are as follows:

[0093] The heat exchange controller 440 detects the water temperature of the wall-mounted water tank 200 (there is a temperature probe at the top and bottom of the inner tank of the wall-mounted water tank 200). When the water temperature at the top of the wall-mounted water tank 200 is detected to be lower than the set value (the set value is obtained by averaging the water temperatures at the top and bottom of the wall-mounted water tank 200), it indicates that the hot water in the wall-mounted water tank 200 is about to run out. The heat exchange controller 440 starts the water pump 240. The cold water at the bottom of the wall-mounted water tank 200 flows from the bottom water outlet into the domestic hot water return port of the wall-mounted boiler 100, enters the plate heat exchanger in the wall-mounted boiler 100 to absorb heat, and after absorbing heat, flows out from the domestic hot water outlet of the wall-mounted boiler 100 back to the heat loading port of the wall-mounted water tank 200. The process continues until the heat exchange controller 440 detects that the temperature probe at the bottom of the wall-mounted water tank 200 has reached the set temperature and then stops.

[0094] The technical solution of the present invention has the following technical effects compared with the prior art:

[0095] This invention forms a combined heating system by setting up a wall-mounted water tank and a multi-energy water tank 300. The intelligent heat exchange module 400 selects different operating modes according to water consumption and frequency, effectively avoiding the problem of frequent start-up and shutdown of the wall-mounted boiler 100. Furthermore, the wall-mounted water tank and the multi-energy water tank 300 can be connected to different water points 800 to ensure a constant temperature of the hot water flowing out, thus avoiding water temperature fluctuations at the water point 800.

[0096] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0097] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A multi-energy household heating system, characterized in that, include: The wall-mounted water tank has its hot water inlet connected to the hot water outlet of the wall-mounted boiler; A multi-energy water tank includes an upper tank and a lower tank, wherein the heat source of the upper tank is a wall-mounted boiler and the heat source of the lower tank is an air source heat pump; The hot water outlets of the wall-mounted water tank and the multi-energy water tank are connected to the water usage points via hot water supply pipes; the hot water return ports of the wall-mounted water tank and the multi-energy water tank are connected to the water usage points via cold water pipes. A flow sensor, installed at the point of water use, is used to collect real-time hot water flow rate; Multiple temperature sensors are installed in each water tank to collect the water tank temperature; The intelligent heat exchange module includes a heat loading unit, a zero-cold-water branch, and a heat exchange controller. The upper tank exchanges heat with the wall-hung boiler through the heat loading unit. One end of the zero-cold-water branch is connected to the point of use, and the other end is connected to the zero-cold-water return inlet of the upper tank and the zero-cold-water return inlet of the lower tank through an electric three-way valve. The heat exchange controller is used to determine the operating mode of the system based on the real-time hot water flow rate. The heat loading unit includes a primary side branch, a secondary side branch, and a plate heat exchange unit; The primary side branch includes a first inlet, a first outlet, a heat source pump, and a heat source temperature probe; the first inlet is connected to the heating hot water outlet of the wall-hung boiler; the first outlet is connected to the heating hot water return port of the wall-hung boiler; the heat source pump and the heat source temperature probe are located between the first inlet and the plate heat exchange unit. The secondary side branch includes a second inlet, a second outlet, a heat loading pump, and a heat loading temperature probe; the second inlet is connected to the heat loading outlet of the upper tank; the second outlet is connected to the heat loading inlet of the upper tank; the heat loading pump is located between the second inlet and the plate heat exchange unit; the heat loading temperature probe is located between the second outlet and the plate heat exchange unit.

2. The multi-energy household heating system according to claim 1, characterized in that, When the upper tank is used as the hot water source for the water point; if the water temperature at the top of the upper tank is lower than the set value -a℃, the heat exchange controller controls the heat source pump to start, and the hot water in the primary side branch circulates; when the real-time temperature collected by the heat source temperature probe reaches the set value, the heat exchange controller controls the heat loading pump to start, and the hot water in the secondary side branch circulates.

3. The multi-energy household heating system according to claim 1, characterized in that, When the upper tank is used as the hot water source for the water point; if the water temperature at the bottom of the upper tank is higher than the set value, the heat exchange controller controls the heat source pump to shut down, and the hot water in the primary side branch stops circulating; when the real-time temperature collected by the heat source temperature probe reaches the set value + a℃, the heat exchange controller controls the heat loading pump to shut down, and the hot water in the secondary side branch stops circulating.

4. A multi-energy household heating system according to claim 1, characterized in that, The heat loading pump is a variable frequency pump. During the operation of the heat loading pump, the heat exchange controller is used to adjust the speed of the heat loading pump in real time according to the set value and the temperature value collected by the heat loading temperature probe to ensure that the temperature value collected by the heat loading temperature probe is equal to the set value.

5. A multi-energy household heating system according to claim 1, characterized in that, The operating modes include new energy mode, low flow mode, high flow mode, and linkage mode.

6. A multi-energy household heating system according to claim 5, characterized in that, When the real-time hot water flow rate is less than αL / min, the system operates in low-flow mode, and the intelligent heat exchange module controls the wall-mounted water tank as the hot water source for the water point; when the real-time hot water flow rate is within the range of [αL / min, βL / min], the system operates in high-flow mode, and the intelligent heat exchange module controls the upper tank as the hot water source for the water point; when the real-time hot water flow rate is greater than βL / min, the system operates in linkage mode, and the intelligent heat exchange module controls the wall-mounted water tank and the upper tank to alternately serve as the hot water source for the water point.

7. A multi-energy household heating system according to claim 5, characterized in that, In the linkage mode, the intelligent heat exchange module has a mode start value. When the real-time hot water flow is less than the mode start value, the wall-mounted water tank is activated first for heating; when the real-time hot water flow is greater than the mode start value, the upper tank is activated first for heating.

8. A multi-energy household heating system according to claim 5, characterized in that, When the new energy mode is in priority operation, the intelligent heat exchange module is used to control the hot water source of the lower tank as the water point, and when the water tank temperature of the lower tank is lower than the set value, the system operation mode is switched to low flow mode, high flow mode or linkage mode according to the real-time hot water flow. When the new energy mode is not prioritized, the intelligent heat exchange module is used to determine the system's operating mode as low flow mode, high flow mode, or linkage mode based on the real-time hot water flow rate, and at the same time control the lower tank to be the preheating source for the wall-mounted water tank and the upper tank.

9. A multi-energy household heating system according to claim 1, characterized in that, The hot water supply pipe is equipped with a first electric three-way valve and a second electric three-way valve; the first outlet of the first electric three-way valve is connected to the water point, the first inlet is connected to the hot water outlet of the upper tank, and the second inlet is connected to the hot water outlet of the wall-mounted water tank; the second outlet of the second electric three-way valve is connected to the water point, the third outlet is connected to the preheated hot water inlet of the upper tank, and the third inlet is connected to the hot water outlet of the lower tank.

10. A multi-energy household heating system according to claim 1, characterized in that, The zero-cold water pipe is equipped with a third electric three-way valve. The fourth outlet of the third electric three-way valve is connected to the zero-cold water return port of the upper tank, the fifth outlet is connected to the zero-cold water return port of the lower tank, and the fourth inlet is connected to the zero-cold water branch.

Images