Method and equipment for utilizing waste heat of water drained after running water washing

Abstract

The invention discloses a method for utilizing waste heat of water drained after running water washing, in which all water drained after running water washing is conveyed into a heat exchanger by using a draining pump under increased pressure without carrying air while entering the heat exchanger, and three types of equipment for implementing the method. The three types of equipment comprise: 1, equipment for utilizing waste heat of water drained after running water washing, in which a draining pump with a self-sucking function and a constant rotary speed separates and exhausts air before entering the heat exchanger after sucking in all water drained after washing and air, 2, equipment for utilizing waste heat of water drained after running water washing, in which a blade water pump without a self-sucking function and with a constant rotary speed conveys water drained after washing under increased pressure after separating and exhausting air from the water drained after washing under the centrifuging function of a blade, and 3, equipment for utilizing waste heat of water drained after running water washing, in which the flow of water drained after washing and conveyed into the heat exchanger by the draining pump under increased pressure is continuous, automatically-adjustable and equal to the flow of water for washing. According to the method and the equipment for utilizing waste heat of water drained after running water washing, waste heat in all water drained after washing can be utilized, sufficient heat exchange between water for washing and water drained after washing in the heat exchanger is ensured, and the heating energy is saved to the maximum extent.

Description

technical field [0001] The invention relates to a waste heat utilization method and equipment, in particular to a waste heat utilization method and equipment for running water washing and drainage. Background technique [0002] Running water washing is a common washing method, such as hand washing, hair washing, showering, car washing, etc. The difference between running water washing and general washing methods is that the washing water flows down from a high place and passes through the object to be washed, and then drains away quickly, except when the washing starts Except that the object to be washed may absorb a part of the water, the flow rate of running water washing water and washing drainage is equal. In addition to the need for a large amount of washing water, running water washing sometimes has requirements on water temperature. To meet the water temperature requirements of running water washing, it also needs to consume a lot of energy to heat or cool the washing...

AI Technical Summary

Problems solved by technology

It is a natural idea to preheat the washing water by using the waste heat in the running water washing drainage through a heat exchanger, and there are also many attempts in this regard, especially the waste heat utilization of the shower drainage, such as the Chinese invention patent on October 26, 2005 The published publication number is CN1686037 "An energy-saving bath room capable of self-heating hot water". In this invention patent, the water from the shower does not use the drainage pump to pressurize and transport it into the heat exchanger, but relies entirely on its own gravity in the heat exchange. Flowing in the device and exchanging heat with shower water, although the structure is simple, the heat exchange efficiency is low; there is also a "special water heater for shower room" with the publication number CN101143075 published on March 19, 2008; Chinese utility model patent The announcement number of the announcement on December 27, 2000 is CN2412197 "shower water preheating energy-saving device". The water supply pressure is different, and the opening of the water inlet valve in the shower is different, which will inevitably lead to the unstable flow of shower water, and the drainage flow of the self-priming drainage pump cannot be adjusted, which will inevitably lead to the failure of the drainage pump. The drainage flow is either greater than the flow of shower water or less than the flow of shower water. The equal flow is just a coincidence; if the drainage flow of the drainage pump is smaller than the flow of shower water, part of the heat in the shower drainage will directly flow away with the shower drainage and cannot be absorbed. Fully utilized; and if the drainage flow of the drainage pump is greater than the flow of shower water, the shower drainage will be intermittent, and a large amount of air will be mixed in the drainage, and enter the heat exchanger, occupying the heat exchange area of ​​the heat exchanger, directly affecting the heat exchanger. At the same time, the water temperature of the shower water after preheating is also fluctuating, which makes it very difficult to control the constant temperature of the shower water in the heater after preheating; in addition, because the controller has no preheating preparation function, the heater It takes a lot of power to keep the shower water warm when the shower starts, especially in winter when the incoming water temperature is low

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