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Control method and water supply machine for preventing water flow from being too low

A control method and water flow technology, applied in non-electric variable control, water supply devices, water supply devices, etc., can solve problems such as pressure loss, increased operating power of water pumps, and high cost of target flow switches

Active Publication Date: 2021-08-24
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem solved by the present invention is that the cost of using the target flow switch in the existing water supply machine is high, and it will bring a certain pressure loss during the use process, resulting in an increase in the operating power of the water pump

Method used

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  • Control method and water supply machine for preventing water flow from being too low
  • Control method and water supply machine for preventing water flow from being too low
  • Control method and water supply machine for preventing water flow from being too low

Examples

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no. 1 example

[0048] see figure 1 , the control method for preventing water flow from being too low provided in this embodiment is applied to a water supply machine, and includes the following steps:

[0049] S11: Obtain the temperature rise value ΔT of the monitoring point of the unit.

[0050]The monitoring point here can be the water pump or the water in the heat exchanger. Because the water flow in the pipeline of the unit is too low, the temperature rise of the water pump and the temperature rise of the water passing through the heat exchanger will be relatively large. Among them, firstly, the temperature value of the monitoring point of the unit is detected. The detection tool can be a temperature sensing package, and the temperature value is detected by the temperature sensing package. Secondly, the temperature rise value ΔT of the monitoring point is calculated by the controller.

[0051] The temperature rise value ΔT of the monitoring point is obtained once at a preset time inter...

no. 2 example

[0061] see figure 2 , the control method for preventing water flow from being too low provided in this embodiment is applied to a water supply machine, and includes the following steps:

[0062] S21: Obtain the temperature rise value Δth of the water pump and the temperature rise value Δt of the water passing through the heat exchanger.

[0063] see Figure 7 , to obtain the temperature rise value Δth of the water pump is because the water flow rate of the water pump is too small, the head of the water pump will increase, but in the actual project, the head needs to be kept constant. Among them, because Q movement=1 / 2*mv2+mgh, the water flow rate in the water pump is small, the m value decreases, the Q movement decreases, and the Q heat increases. Therefore, when the water flow rate of the water pump is too small, the load of the water pump will increase rapidly, and the motor will heat up. In this way, when the water flow rate of the water pump is too small, the temperatur...

no. 3 example

[0082] see image 3 , the control method for preventing water flow from being too low provided in this embodiment is applied to a water supply machine, and includes the following steps:

[0083] S31: Obtain the temperature rise value Δth of the water pump and the temperature rise value Δt of the water passing through the heat exchanger.

[0084] S31 here is the same as S21 in the second embodiment, and will not be repeated here.

[0085] S32: Detect whether the temperature rise value Δth reaches the first threshold T1 and whether the temperature rise value Δt reaches the second threshold T2.

[0086] S32 here is the same as S22 in the second embodiment, and will not be repeated here.

[0087] When the temperature rise value Δth reaches the first threshold T1 and the temperature rise value Δt reaches the second threshold T2, both are satisfied, then execute S33: control the generator set to be powered off. If neither the temperature rise value Δth nor the temperature rise va...

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Abstract

The invention provides a control method and a water supply machine for preventing water flow from being too low, and relates to the technical field of water supply machines. The control method for preventing the water flow rate from being too low is applied to the water supply machine. The control method includes: obtaining the temperature rise value ΔT of the monitoring point of the unit; detecting whether the temperature rise value ΔT reaches the threshold T; when the temperature rise value ΔT reaches the threshold value At T, the control unit is powered off. The control method provided by the invention does not need to add a target current switch or other devices, and has low cost and does not have any negative impact on the existing devices.

Description

technical field [0001] The invention relates to the technical field of water supply machines, in particular to a control method for preventing water flow from being too low and a water supply machine. Background technique [0002] During the operation of the water supply unit, water is used as the refrigerant, which can transport the heat or cold generated by the unit to the indoor end for indoor users to play the role of heating or cooling. However, in the case of insufficient water flow in the pipeline of the unit, the insufficient water flow will lead to problems such as poor heat exchange effect of the unit, excessively high return temperature of the brine, and high-load operation of the water pump, which will seriously affect the reliability of the unit. [0003] In the existing water supply machine, in order to prevent the water flow in the pipeline from being too low, the water flow in the pipeline is detected by setting a target flow switch. When the water flow is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D27/02E03B11/02E03B1/04F24D19/10
CPCE03B1/04E03B11/02F24D19/1006G05D27/02
Inventor 张雪琪
Owner NINGBO AUX ELECTRIC