A control method for a wall-mounted boiler and a wall-mounted boiler

Abstract

The present invention discloses a control method for a wall-mounted boiler and a wall-mounted boiler. The control method for the wall-mounted boiler comprises the following steps: S1: Set the heating temperature T0; S2: Set the stage temperature target value; S3: The wall-mounted boiler burns at the lowest load and calculates the temperature rise value per unit power; S4: Adjust the operating load value of the wall-mounted boiler according to the temperature rise value per unit power, the current outlet water temperature value and the rated power of the wall-mounted boiler so as to reach the stage temperature target value; S5: Judge whether the stage temperature target value < T0 - T1, if not, then enter S6, if so, then enter S8; S6: Judge whether the condition for stopping combustion is reached, if so, the wall-mounted boiler stops combustion, if not, then enter S7; S7: The wall-mounted boiler burns at the current load and returns to S6; S8: Set the next stage temperature target value; S9: Adjust the operating load value of the wall-mounted boiler according to the temperature rise value per unit power, the current outlet water temperature value and the rated power of the wall-mounted boiler so as to reach the stage temperature target value, and then return to S5.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a control method for a wall-mounted boiler and a wall-mounted boiler. Background Art

[0002] Most existing wall-mounted boilers are dual-purpose for domestic water and heating. In the north, due to the economy and convenience of gas heating, more and more families are adopting them. In order to achieve rapid heating, existing wall-mounted boilers generally operate at the maximum combustion load when just starting up. Although this method can achieve rapid heating, it will cause the local water to instantaneously rise to a high temperature, which will further cause the water in this part to scale more easily, and ultimately reduce the service life of the wall-mounted boiler.

[0003] Therefore, there is an urgent need for a control method for a wall-mounted boiler to solve the above problems. Summary of the Invention

[0004] The present invention aims to solve at least one of the problems existing in the related art to some extent. For this purpose, the present invention provides a control method for a wall-mounted boiler, which can make the outlet water temperature of the wall-mounted boiler rise slowly until it reaches the heating temperature T0, avoiding the local water generating high temperature due to the instantaneous large-load combustion of the wall-mounted boiler, thereby reducing the generation of scale and prolonging the service life of the wall-mounted boiler.

[0005] The above object is achieved by the following technical solutions:

[0006] A control method for a wall-mounted boiler includes the following steps:

[0007] S1: Set the heating temperature T0;

[0008] S2: Set the stage temperature target value;

[0009] S3: The wall-mounted boiler burns at the lowest load and calculates the temperature rise value per unit power;

[0010] S4: Adjust the operating load value of the wall-mounted boiler according to the temperature rise value per unit power, the current outlet water temperature value and the rated power of the wall-mounted boiler to reach the stage temperature target value;

[0011] S5: Judge whether the stage temperature target value < T0 - T1. If not, enter S6; if so, enter S8;

[0012] S6: Judge whether the condition for stopping combustion is reached. If so, the wall-mounted boiler stops burning; if not, enter S7;

[0013] S7: The wall-mounted boiler burns at the current load and returns to S6;

[0014] S8: Set the next stage temperature target value;

[0015] S9: Adjust the operating load value of the wall-mounted boiler according to the temperature rise per unit power, the current outlet water temperature value, and the rated power of the wall-mounted boiler to reach the temperature target value at this stage, and then return to S5.

[0016] Optionally, the specific steps of S6 are as follows:

[0017] S61: Determine whether T0 - T1 ≤ the current outlet water temperature T ≤ T0 + T2. If so, enter S62; if not, the wall-mounted boiler stops burning.

[0018] S62: Determine whether the wall-mounted boiler has burned for more than the preset time t0. If so, the wall-mounted boiler stops burning; if not, the wall-mounted boiler burns at the current load.

[0019] Wherein, T2 is the floating temperature value.

[0020] Optionally, in S61, when determining whether T0 - T1 ≤ the current outlet water temperature T ≤ T0 + T2, if not, enter the following steps:

[0021] S611: Reduce the combustion load of the wall-mounted boiler.

[0022] S612: Determine whether T0 - T1 ≤ the current outlet water temperature T ≤ T0 + T2. If so, return to S62; if not, the wall-mounted boiler stops burning.

[0023] Optionally, in S611, reducing the combustion load of the wall-mounted boiler includes reducing the combustion load of the wall-mounted boiler to be greater than or equal to the minimum combustion load of the wall-mounted boiler.

[0024] Optionally, in S6, after the wall-mounted boiler stops burning, it further includes S60: Determine whether the current outlet water temperature is less than the preset value T3. If so, return to S2; if not, the wall-mounted boiler stops burning.

[0025] Optionally, in S4 and S9, the calculation steps of the temperature rise per unit power are as follows:

[0026] S100: Measure multiple outlet water temperatures TOUT1, TOUT2... TOUTn and multiple return water temperatures TIN1, TIN2... TINn at intervals of time t0 within the time tn.

[0027] S200: Calculate the average temperature rise per unit power E0 = ((TOUT1 - TIN1) + (TOUT2 - TIN2)... + (TOUTn - TINn)) / tn as the temperature rise per unit power.

[0028] Optionally, in S4 and S9, adjusting the operating load value of the wall-mounted boiler according to the temperature rise per unit power, the current outlet water temperature value, and the rated power of the wall-mounted boiler specifically includes the following steps:

[0029] S101: Obtain the power consumption W per degree of temperature increase through calculation: W = W0 / E0;

[0030] S102: Obtain the adjusted load ΔW through calculation: ΔW = (T4 - TOUTn) × W0 / E0;

[0031] S103: Obtain the total output load W1 through calculation: W1 = W0 + ΔW, and the wall-mounted boiler burns at the load of W1;

[0032] Wherein, T4 is the target value of the stage temperature, and W0 is the minimum load of the wall-mounted boiler.

[0033] Optionally, in S103, after obtaining the total output load W1 = W0 + ΔW through calculation, the following steps are further included:

[0034] S104: Judge whether W2 > W1. If so, enter S105; if not, the wall-mounted boiler burns at the load of W1;

[0035] S105: Every time a preset time t' elapses, increase the output load of W3 until the current outlet water temperature value reaches the target value of this stage temperature, where W3 < W2 - W1;

[0036] Wherein, W2 is the rated load of the wall-mounted boiler.

[0037] Optionally, the preset time t' is the time required for the water circulation in the pipeline of the wall-mounted boiler to complete one cycle.

[0038] On the other hand, the present invention provides a wall-mounted boiler that operates using the above control method of the wall-mounted boiler.

[0039] Compared with the prior art, the present invention has at least the following beneficial effects:

[0040] The control method of the wall-mounted boiler provided by the present invention sets multiple stage target values, enabling the wall-mounted boiler to slowly increase the combustion load, and gradually making the outlet water temperature reach the heating temperature T0, avoiding the local water generating high temperature due to the wall-mounted boiler burning at a large load instantaneously, thereby reducing the generation of scale and extending the service life of the wall-mounted boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a step diagram of the control method of the wall-mounted boiler provided by a specific embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The following embodiments are used to illustrate the present invention, but the present invention is not limited by these embodiments. Modifications to the specific implementation manners of the present invention or equivalent replacements of some technical features, without departing from the spirit of the present invention's solution, shall all be covered within the scope of the technical solution claimed by the present invention.

[0043] Please refer to Figure 1 , the present invention provides a control method for a wall-mounted boiler, including the following steps:

[0044] S1: Set the heating temperature T0;

[0045] S2: Set the stage temperature target value;

[0046] S3: The wall-mounted boiler burns at the lowest load and calculates the temperature rise value per unit power;

[0047] S4: Adjust the operating load value of the wall-mounted boiler according to the temperature rise value per unit power, the current outlet water temperature value, and the rated power of the wall-mounted boiler to reach the stage temperature target value;

[0048] S5: Judge whether the stage temperature target value < T0 - T1. If not, enter S6; if so, enter S8;

[0049] S6: Judge whether the condition for stopping combustion is reached. If so, the wall-mounted boiler stops burning; if not, enter S7;

[0050] S7: The wall-mounted boiler burns at the current load and returns to S6;

[0051] S8: Set the next stage temperature target value;

[0052] S9: Adjust the operating load value of the wall-mounted boiler according to the temperature rise value per unit power, the current outlet water temperature value, and the rated power of the wall-mounted boiler to reach the stage temperature target value, and then return to S5.

[0053] The control method for the wall-mounted boiler provided by the present invention sets multiple stage target values, enabling the wall-mounted boiler to slowly increase the combustion load, and gradually making the outlet water temperature reach the heating temperature T0, avoiding high temperatures generated locally due to the wall-mounted boiler burning at a large load instantaneously, thereby reducing the generation of scale and extending the service life of the wall-mounted boiler.

[0054] Optionally, to balance the heating speed, the first-stage temperature target value can be set to a value close to the heating temperature T0. For example, the first-set stage temperature target value is greater than the difference between T0 and the set temperature value. Specifically, those skilled in the art can set the set temperature value according to actual needs. Specifically, the set temperature value can be taken as a value between 5 - 15°C. In this embodiment, the set temperature value is 6°C.

[0055] It should be noted that the temperature target value in the previous stage is smaller than that in the next stage.

[0056] Optionally, S6 specifically includes the following steps:

[0057] S61: Determine whether T0 - T1 ≤ the current outlet water temperature T ≤ T0 + T2. If so, proceed to S62; if not, the wall-mounted boiler stops burning.

[0058] S62: Determine whether the wall-mounted boiler has burned for more than the preset time t0. If so, the wall-mounted boiler stops burning to prevent the water in the wall-mounted boiler from remaining at a high temperature and scaling severely. If not, the wall-mounted boiler burns at the current load.

[0059] Wherein, T2 is a floating temperature value that can be set according to actual needs. Exemplarily, in this embodiment, T2 is 5 degrees.

[0060] Optionally, in S61, when determining whether T0 - T1 ≤ the current outlet water temperature T ≤ T0 + T2, if not, proceed to the following steps:

[0061] S611: Reduce the combustion load of the wall-mounted boiler.

[0062] S612: Determine whether T0 - T1 ≤ the current outlet water temperature T ≤ T0 + T2. If so, return to S62; if not, the wall-mounted boiler stops burning.

[0063] Optionally, in S611, reducing the combustion load of the wall-mounted boiler includes reducing the combustion load of the wall-mounted boiler to be greater than or equal to the minimum combustion load of the wall-mounted boiler. Specifically, to avoid waste of energy consumption, in this embodiment, the combustion load of the wall-mounted boiler is directly reduced to the minimum combustion load.

[0064] Optionally, in S6, after the wall-mounted boiler stops burning, it further includes S60: Determine whether the current outlet water temperature is less than the preset value T3. If so, return to S2; if not, the wall-mounted boiler stops burning.

[0065] Optionally, in S4 and S9, the calculation steps for the temperature rise per unit power are as follows:

[0066] S100: At time tn, measure multiple outlet water temperatures TOUT1, TOUT2... TOUTn and multiple return water temperatures TIN1, TIN2... TINn at intervals of time t0.

[0067] S200: Calculate the average temperature rise per unit power E0 = ((TOUT1 - TIN1) + (TOUT2 - TIN2)... + (TOUTn - TINn)) / tn as the temperature rise per unit power.

[0068] By calculating the average value E0 of the temperature rise per unit power, the accuracy of the temperature rise per unit power is improved.

[0069] Optionally, in S4 and S9, adjusting the operating load value of the wall-mounted boiler according to the temperature rise per unit power, the current outlet water temperature value and the rated power of the wall-mounted boiler specifically includes the following steps:

[0070] S101: Obtain the power consumption W per degree of temperature rise by calculation: W = W0 / E0;

[0071] S102: Obtain the adjusted load ΔW by calculation: ΔW = (T4 - TOUTn) × W0 / E0;

[0072] S103: Obtain the total output load W1 by calculation: W1 = W0 + ΔW, and the wall-mounted boiler burns at the load of W1;

[0073] Wherein, T4 is the stage temperature target value, and W0 is the minimum load of the wall-mounted boiler.

[0074] Optionally, in S103, after obtaining the total output load W1 = W0 + ΔW by calculation, the following steps are further included:

[0075] S104: Judge whether W2 > W1. If so, enter S105. If not, the wall-mounted boiler burns at the load of W1;

[0076] S105: Every time a preset time t' elapses, increase the output load of W3 until the current outlet water temperature value reaches the stage temperature target value, and W3 < W2 - W1;

[0077] Wherein, W2 is the rated load of the wall-mounted boiler.

[0078] By gradually increasing the output load of W3, the outlet water temperature reaches the heating temperature T0 after one or more preset times t'. The water temperature of the wall-mounted boiler rises slowly, avoiding the problem of serious water scaling caused by instantaneous temperature rise.

[0079] Optionally, the preset time t' is the time required for the water in the pipeline of the wall-mounted boiler to circulate once. Exemplarily, in this embodiment, the time required for the water in the pipeline of the wall-mounted boiler to circulate once is one and a half minutes.

[0080] On the other hand, the present invention provides a wall-mounted boiler that operates using the above-mentioned control method of the wall-mounted boiler.

[0081] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A control method for a wall-mounted boiler, characterized in that, It includes the following steps: S1: Set the heating temperature T0; S2: Set the stage temperature target value; S3: The wall-mounted boiler burns at the lowest load and calculates the temperature rise per unit power; S4: According to the temperature rise per unit power, the current outlet water temperature value and the rated power of the wall-mounted boiler, adjust the operating load value of the wall-mounted boiler to reach the stage temperature target value; S5: Judge whether the stage temperature target value < T0 - T1. If not, enter S6. If so, enter S8; S6: Judge whether the condition for stopping combustion is met. If so, the wall-mounted boiler stops burning. If not, enter S7; S7: The wall-mounted boiler burns at the current load and returns to S6; S8: Set the next stage temperature target value; S9: According to the temperature rise per unit power, the current outlet water temperature value and the rated power of the wall-mounted boiler, adjust the operating load value of the wall-mounted boiler to reach the stage temperature target value, and then return to S5; In S4 and S9 above, the calculation steps of the temperature rise per unit power are as follows: S100: Measure multiple outlet water temperatures TOUT1, TOUT2... TOUTn and multiple return water temperatures TIN1, TIN2... TINn at intervals of time t0 within time tn; S200: Calculate the average temperature rise per unit power E0 = ((TOUT1 - TIN1) + (TOUT2 - TIN2)... + (TOUTn - TINn)) / tn as the temperature rise per unit power; In S4 and S9 above, according to the temperature rise per unit power, the current outlet water temperature value and the rated power of the wall-mounted boiler, adjusting the operating load value of the wall-mounted boiler specifically includes the following steps: S101: Obtain the power consumption per degree of temperature rise W = W0 / E0 by calculation; S102: Obtain the adjusted load △W = (T4 - TOUTn) × W0 / E0 by calculation; S103: Obtain the total output load W1 = W0 + △W by calculation, and the wall-mounted boiler burns at the load of W1; Among them, T4 is the stage temperature target value, and W0 is the lowest load of the wall-mounted boiler; In S103 above, after obtaining the total output load W1 = W0 + △W by calculation, it also includes the following steps: S104: Judge whether W2 > W1. If so, enter S105. If not, the wall-mounted boiler burns at the load of W1; S105: Every interval of the preset time t', increase the output load of W3 until the current outlet water temperature value reaches the stage temperature target value, and W3 < W2 - W1; Among them, W2 is the rated load of the wall-mounted boiler.

2. The control method of the wall-mounted boiler according to claim 1, characterized in that S6 specifically includes the following steps: S61: Judge whether T0 - T1 ≤ the current outlet water temperature T ≤ T0 + T2. If so, enter S62. If not, the wall-mounted boiler stops burning; S62: Judge whether the wall-mounted boiler has burned for more than the preset time t0. If so, the wall-mounted boiler stops burning. If not, the wall-mounted boiler burns at the current load; Among them, T2 is the floating temperature value.

3. The control method of the wall-mounted boiler according to claim 2, characterized in that, In S61 above, when judging whether T0 - T1 ≤ the current outlet water temperature T ≤ T0 + T2, if not, enter the following steps: S611: Reduce the combustion load of the wall-mounted boiler; S612: Determine whether T0 - T1 ≤ the current outlet water temperature T ≤ T0 + T2. If so, return to S62; if not, the wall-mounted boiler stops burning.

4. The control method of the wall-mounted boiler according to claim 3, characterized in that In the above S611, reducing the combustion load of the wall-mounted boiler includes reducing the combustion load of the wall-mounted boiler to be greater than or equal to the minimum combustion load of the wall-mounted boiler.

5. The control method of the wall-mounted boiler according to claim 1, characterized in that In the above S6, after the wall-mounted boiler stops burning, it further includes S60: Determine whether the current outlet water temperature is less than the preset value T3. If so, return to S2; if not, the wall-mounted boiler stops burning.

6. The control method of the wall-mounted boiler according to claim 1, characterized in that, The above preset time t' is the time required for the water in the pipeline of the wall-mounted boiler to circulate once.

7. A wall-mounted boiler, characterized in that, Operate using the control method of the wall-mounted boiler according to any one of claims 1 - 6.

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