Multiple-cavity heat preservation water tank free of water mixing

Abstract

The invention relates to a multiple-cavity heat preservation water tank free of water mixing. The multiple-cavity heat preservation water tank free of water mixing is characterized in that the inside of a tank body is divided by a plurality of separation plates or separation films into N hollow cavities, each hollow cavity is provided with water passing holes, the water passing holes of the first hollow cavity are communicated with the second hollow cavity, the Nth hollow cavity is provided with a hot water supply port, the water passing holes of the Nth hollow cavity are only communicated with the (N-1)th hollow cavity, the water passing holes of the other hollow cavities are respectively communicated with a former hollow cavity and a later hollow cavity, the inside of the water tank forms a through path, and in the through path, series connection is formed from the first hollow cavity to the Nth hollow cavity, and all the hollow cavities are communicated. The first hollow cavity is provided with a water outlet which is communicated with a water outlet of an external water pump through a water outlet pipe, the water tank is provided with at least one water return port which is communicated with the water outlet of the external water pump through a water return pipe, the Nth hollow cavity is provided with a water return port, one hollow cavity in the middle of the water tank is provided with a cold water supplementing port. The multiple-cavity heat preservation water tank free of water mixing can basically avoid the phenomenon of mixing of cold water and hot water, improves the energy efficiency ratio and the heating capacity of a system, guarantees the hot water supply and the stability of outlet water temperature, adopts a sectional heating method, reaches a required temperature rapidly, and reduces power of equipment configuration and the size of the water tank.

Description

technical field [0001] The invention relates to an insulated water tank used in a water storage type water heater (water heater), in particular to an insulated water storage tank with multiple cavities and non-mixed water. The main application scope is: various water storage water heaters, water heaters, especially various heat pump water heaters (water heaters), including air source, water source, and ground source heat pump water heaters. Background technique [0002] The hot water use of water heaters and water heaters generally has peak and trough periods. In order to reduce the power configuration and cost of the host equipment, most of them do not use instant heating, but use water storage. Therefore, heat preservation storage is used. water tank. [0003] Heat pump water heaters are currently the most energy-efficient among all types of water heaters. Compared with electric water heaters, they can save an average of 75% of electricity. Therefore, they are also the fa...

AI Technical Summary

Problems solved by technology

[0008] The first type of mixed water single water tank is relatively simple and the most widely used, but the hot water supply is small (especially when the water supply temperature is low), and the water temperature stability and energy efficiency ratio are poor.

Its main defect 1: use more than 1 / 3 of the hot water of the water tank volume in a short period of time, and the water temperature will drop rapidly

Main defect 2: low energy efficiency ratio, small heating capacity, high equipment configuration power, long-term operation of the equipment in a bad state of high condensation temperature, high condensation pressure, and large operating current

It is very common for the inlet water temperature to be 5-10°C in winter, and winter is when the operating load of the equipment is the largest and the working conditions are the worst. The working principle will seriously affect the use effect of heat pump equipment: increase power consumption, reduce heating capacity, reduce hot water supply, and the water temperature drops rapidly during use. This phenomenon is especially serious for air source heat pumps.

In winter, if the heat pump equipment of the mixed water type single water tank method needs to provide sufficient heating capacity, the only way is to use the following methods: first, add a high-power electric heater, which further reduces the energy efficiency ratio; second, increase the configured power of the heat pump host or number of units, which increases the cost of equipment investment

At the same time, the running time and energy consumption of the heat pump main engine in winter account for more than 50% of the whole year, and its low energy efficiency ratio will greatly affect the overall effect and operating cost of the equipment throughout the year.

Main defect 3: No matter how much hot water is needed for actual use, the whole tank of water must be heated up to temperature before use, resulting in a long waiting time for heating, and the inexhaustible hot water is gradually cooled, wasting energy

Its main defects include: 1. Increase the number of water tanks, water pumps, multiple solenoid valves, water level sensors, and connecting pipelines, which also increases the complexity of the system, the probability of failure, and the cost and construction volume of the system

2. The water tank of this structure cannot use a pressure-bearing water tank, so in order to ensure the water supply pressure, a booster pump must be added. For small-power household heat pump water heaters, it is inappropriate to configure two water tanks, plus a booster pump. Economy

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