Control method for wall-mounted combination boiler, and wall-mounted combination boiler

Abstract

Disclosed in the present invention is a control method for a wall-mounted combination boiler, comprising a summer mode and a winter mode. In the summer mode, the control method comprises the following steps: step 1, when a user uses domestic hot water, a valve body is in a domestic hot water state; step 2, when the user finishes using the domestic hot water, the valve body continues to remain in the domestic hot water state, and a water pump drives a water flow for post-circulation for a time period T1; and step 3, the valve body is switched to a heating state, and after a time period T2, switched back to the domestic hot water state again, wherein T2<T1. In the summer mode, when the user finishes using the domestic hot water, the valve body still remains in the domestic hot water state. At this time, a heating flow passage remains closed, a domestic hot water flow passage remains open, and post-circulation of the water pump is smooth. Because the heating flow passage is closed, a water flow does not flow to heating piping, the water pressure of internal piping does not increase, thereby avoiding abnormal noise. Moreover, a brief switching operation after each use of domestic hot water can effectively prevent shaft seizure caused by non-switching for the valve body for a long period, thereby improving reliability.

Description

A control method for a wall-hung boiler and the wall-hung boiler Technical Field

[0001] This invention relates to the field of wall-hung boiler technology, and in particular to a control method for a wall-hung boiler and the wall-hung boiler itself. Background Technology

[0002] A typical wall-hung boiler includes a water pump, a main heat exchanger, a plate heat exchanger, and a valve body. The valve body is equipped with a motor that drives the valve body to switch between heating and bathing modes. The existing control logic of wall-hung boilers on the market is as follows: In summer mode, after the user finishes using domestic hot water, the valve body switches to heating mode. The water pump drives the hot water from the plate heat exchanger to the main heat exchanger and back to the plate heat exchanger for a secondary circulation, ultimately driving the water flow to the heating pipes. (After the entire unit finishes combustion, the water pump will perform a secondary circulation for one or two minutes to transfer as much heat as possible and prevent excessive heat accumulation in the heat exchangers, leading to scale buildup.) However, in summer, since users do not need heating, the heating outlet valve is closed. At this time, the water flow driven by the secondary circulation cannot flow to the heating pipes, causing increased water pressure inside the boiler, resulting in impacts and abnormal noises from the three-way motor. To prevent water from flowing into the heating pipes, existing technology keeps the valve in the bathing state after the user finishes using the bath water. However, this keeps the valve in the bathing state throughout the summer, which can easily cause the valve to get stuck. Technical solutions

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a control method and a wall-hung boiler that can avoid increasing the water pressure in the internal pipeline while avoiding valve body jamming.

[0004] According to a first aspect of the present invention, a control method for a wall-hung boiler includes a summer mode and a winter mode, wherein the summer mode includes the following steps:

[0005] Step 1: When the user uses bath water, the valve body is in the bathing state;

[0006] Step 2: After the user finishes using the bath water, the valve body remains in the bathing state, and the water pump drives the water flow to circulate after time T1.

[0007] Step 3: Switch the valve body to heating mode, and switch back to bathing mode after time T2.

[0008] Where T2 < T1.

[0009] According to some embodiments of the present invention, in winter mode, the following steps are included:

[0010] Step S1: When the user uses bath water, the valve body switches to the bathing state;

[0011] Step S2: After the user finishes using the bath water, the valve body switches to the heating state, and the water pump circulates the water to the heating pipe.

[0012] According to some embodiments of the present invention, the value range of T1 is 1~2 min, and the value range of T2 is 1~5 s.

[0013] According to a second aspect embodiment of the present invention, a wall-hung boiler using the above-described control method includes a valve body, wherein a main channel is formed inside the valve body, and a heating flow channel and a bathing flow channel are respectively connected to the main channel. The main channel is provided with a switching shaft extending along its axial direction and movable, and a sealing ring provided on the switching shaft. When the switching shaft moves, it can drive the sealing ring to selectively seal the heating flow channel and the bathing flow channel. Beneficial effects

[0014] The control method and the wall-hung boiler of the present invention have at least the following beneficial effects: In summer mode, after the user finishes using bath water, the valve body remains in the bathing state. At this time, the heating flow channel remains closed, the bathing flow channel remains open, and the water pump circulation is unobstructed. Because the heating flow channel is closed, water will not flow into the heating pipe, the internal pipe water pressure will not increase, and no abnormal noise will occur. After a circulation time T1, the valve body switches to the heating state. At this time, the heating flow channel is open and the bathing flow channel is closed. After a short time T2, the valve body switches back to the bathing state. At this time, the heating flow channel is closed and the bathing flow channel is open, ready for the next user's bathing water use. The brief switching after each bathing water use can effectively avoid the phenomenon of valve body jamming due to prolonged non-switching, thus improving reliability.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings;

[0017] Figure 1 is a structural diagram of the valve body and plate heat exchanger of the wall-hung boiler;

[0018] Figure 2 is a schematic diagram of the heat source circulation of the wall-hung boiler. The best embodiment of the present invention

[0019] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] Referring to Figures 1 and 2, the present invention provides a control method for a wall-hung boiler, including a summer mode and a winter mode. The summer mode includes the following steps:

[0023] Step 1: When the user uses bath water, the valve body 30 is in the bathing state;

[0024] Step 2: After the user finishes using the bath water, the valve body 30 continues to remain in the bathing state, and the water pump 40 drives the water flow to circulate after time T1.

[0025] Step 3: Switch valve body 30 to heating mode, and switch back to bathing mode after time T2.

[0026] Where T2 < T1.

[0027] In winter mode, the following steps are included:

[0028] Step S1: When the user uses bath water, the valve body 30 switches to the bathing state;

[0029] In step S2, after the user finishes using the bath water, valve body 30 switches to the heating state, and the water pump circulates the water to the heating pipeline.

[0030] In summer mode, when the wall-mounted boiler is powered on, valve body 30 is already in the bathing state before the user uses water for showering. After the user finishes showering, valve body 30 remains in the bathing state. At this time, the heating flow channel remains closed, the showering flow channel remains open, and the water pump 40 ensures smooth circulation. Because the heating flow channel is closed, water will not flow into the heating pipes, the internal pipe water pressure will not increase, and no abnormal noise will occur. After a circulation time T1, valve body 30 switches to the heating state. At this time, the heating flow channel is open and the showering flow channel is closed. After a short time T2, valve body 30 switches back to the showering state. At this time, the heating flow channel is closed and the showering flow channel is open, ready for the next user's shower. This brief switching after each shower effectively prevents valve body 30 from jamming due to prolonged inactivity, improving reliability.

[0031] In some embodiments, the value of T1 ranges from 1 to 2 minutes. After the entire machine has finished running, the water pump will circulate again, which means it will continue to run for one or two minutes. The purpose is to transfer the heat away as much as possible and prevent the heat exchanger from accumulating too much heat and producing scale.

[0032] In some embodiments, T2 ranges from 1 to 5 seconds; further, T2 is 3 to 5 seconds; after extensive sample testing, T2 is preferably 5 seconds. At this time, the amount of water flowing into the heating pipe is small, which will not cause an increase in internal pipe pressure, and 5 seconds is sufficient for the program, motor 60, and valve body 30 to react and perform reliable switching. A brief switching after each shower effectively prevents the valve body 30 from jamming due to prolonged inactivity, thus improving reliability.

[0033] The present invention also protects a wall-hung boiler that uses the above-mentioned control method for the wall-hung boiler. The wall-hung boiler includes a valve body 30, in which a main channel 31 is formed. The valve body 30 is provided with a heating flow channel and a bathing flow channel that are respectively connected to the main channel 31. The main channel 31 is provided with a switching shaft 310 that extends along its axial direction and is movable, and a sealing ring provided on the switching shaft 310. When the switching shaft 310 moves, it can drive the sealing ring to selectively seal the heating flow channel and the bathing flow channel.

[0034] As shown in Figure 2, the wall-hung boiler includes a main heat exchanger 10, a plate heat exchanger 20, and a pump body 40. The valve body 30 is provided with a bath water outlet 32 ​​and a first hot water inlet 33, a first hot water outlet 34, and a heating water outlet 35, which are respectively connected to the main channel 31. The plate heat exchanger 20 is provided with a cold water inlet 21, a second hot water inlet 22, a second hot water outlet 23 connected to the cold water inlet 21, and a warm water outlet 24 connected to the second hot water inlet 22. The warm water outlet 24 is connected to the inlet of the main heat exchanger 10, the outlet of the main heat exchanger 10 is connected to the first hot water inlet 33, the first hot water outlet 34 is connected to the second hot water inlet 22, and the second hot water outlet 23 is connected to the bath water outlet 32. The first hot water inlet 33 and the heating water outlet 35 form a heating flow channel, and the first hot water inlet 33, the first hot water outlet 34, and the bath water outlet 32 ​​form a bath flow channel. The sealing rings include a first sealing ring 321 and a second sealing ring 322. When the switching shaft 310 moves, it can selectively seal the heating water outlet 35 and the first hot water outlet 34. When the user uses the shower, the second sealing ring 322 seals the heating water outlet 35. The hot water from the main heat exchanger 10 enters the main heat exchanger 10 sequentially through the first hot water inlet 33, the first hot water outlet 34, the second hot water inlet 22, and the warm water outlet 24, realizing a small circulation for showering. At the same time, the heat source exchanges heat with the cold water entering from the cold water inlet in the plate heat exchanger 20. The cold water becomes hot water and flows out sequentially through the second hot water outlet 23 and the shower water outlet 32. When the user uses the heating system, the first sealing ring 321 seals the first hot water outlet 34 and opens the heating water outlet 35. Hot water flows out through the heating water outlet 35, realizing indoor heating.

[0035] It will be readily understood by those skilled in the art that the above preferred methods can be freely combined and superimposed without conflict.

[0036] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct or indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A control method of a wall-mounted boiler including a summer mode and a winter mode, characterized in that, The summer mode includes the following steps: Step 1: When the user uses bath water, the valve body (30) is in the bathing state; Step 2: After the user finishes using the bath water, the valve body (30) continues to remain in the bathing state, and the water pump drives the water flow to circulate after time T1. Step 3, the valve body (30) is switched to the heating state, and then switched back to the bathing state after time T2; Where T2 < T1.

2. The control method of a wall-mounted furnace according to claim 1, characterized by, In winter mode, the following steps are included: Step S1: When the user uses bath water, the valve body (30) switches to the bathing state; Step S2: After the user finishes using the bath water, the valve body (30) switches to the heating state, and the water pump drives the water to flow to the heating pipeline.

3. The control method of a wall-mounted furnace according to claim 1, characterized by: The value of T1 ranges from 1 to 2 minutes, and the value of T2 ranges from 1 to 5 seconds.

4. A wall-mounted boiler, applying the control method of the wall-mounted boiler according to any one of claims 1 to 3, characterized in that: The valve body (30) includes a main channel (31) formed inside the valve body (30). The valve body (30) is provided with a heating flow channel and a bathing flow channel that are respectively connected to the main channel (31). The main channel (31) is provided with a switching shaft (310) that extends along its axial direction and is movable, and a sealing ring provided on the switching shaft (310). When the switching shaft (310) moves, it can drive the sealing ring to selectively seal the heating flow channel and the bathing flow channel.

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