instant water heater

Abstract

The invention provides an instant water heater heated by a heat pump. It includes a controller, a waterway and a heat pump circulation circuit; the waterway includes: a water inlet, a heating part, and a water outlet in sequence according to the direction of water flow; a water flow sensor is provided in the waterway, and the water flow sensor is connected to the controller to detect whether there is water in the waterway The water flows, the heating part is provided with a water temperature sensor and an electric heating element, the water temperature sensor is connected with the controller for detecting the water temperature in the heating part, and the electric heating element is connected with the controller for control; the heat pump circulation loop includes: Machine, evaporator, condenser, throttling device, the compressor is connected to the controller, and the condenser is in heat conduction contact with the heating part in the waterway; the controller is used to detect the water flow in the waterway when the water flow sensor In the static state, and when the water temperature detected by the water temperature sensor is lower than the set temperature, the electric heating element is turned on to heat the water in the heating part.

Description

technical field [0001] The invention relates to an instant water heater, and also relates to a water heater heated by a heat pump. Background technique [0002] Instantaneous water heaters are also called fast or quick-heating water heaters. Its characteristics are: when cold water is superheated, as long as the water outlet valve is opened, hot water can be continuously supplied in a short period of time. When hot water is not used, close the outlet water. The valve cuts off the water circuit to stop heating in a short time. Most of the current instantaneous water heaters are electric heating type and gas type. [0003] The principle of the electric heating instant water heater is to use a relatively high-power electric heater to quickly heat the cold water flowing through the heating area, so that it can quickly reach the predetermined operating temperature and achieve the purpose of cold water entering and hot water exiting. The water storage device on the heat storage ...

AI Technical Summary

Problems solved by technology

[0007] The air energy heat pump heating system used in existing air energy water heaters generally consists of three parts, one is the host part, the other is the water tank part, and the third is the heating system part; for household water tanks, 1. The capacity is generally 150 -320L, the volume of the water tank is huge, and it needs to occupy a large part of the building area during installation. Even if some water tanks are installed outside the wall with brackets, due to the weight of the water tank itself, this kind of installation method is quite dangerous; 2. The liner of the water tank The material and process used by itself, whether it is a stainless steel liner or an enamel liner, due to the defects of the manufacturing process, water leakage from the water tank is unavoidable; 3. The heat exchanger inside the water tank generally uses copper or stainless steel tubes. In poor areas, the heat exchange tubes will be corroded and perforated, resulting in refrigerant leakage. Once a leak occurs, it will be fatal to the unit; 4. The main engine and the water tank need to be connected by a connecting pipe, which is difficult to avoid artificially during installation. 5. Due to the characteristics of the water storage heat pump, the water temperature needs to be raised to a higher temperature, and it takes a long time, which cannot meet the immediate water use requirements, and in the later stage of water use, the water temperature fluctuates greatly, which affects the use In addition, the condensing temperature determines the energy consumption of the unit. The traditional unit with a water tank operates at a high condensing temperature and high condensing pressure for a long time, which will be a great test for the life of the compressor; 6. Using storage Water-type water tanks generally need to mix water when using water, which will cause several problems. 1) The utilization rate of hot water in the water tank is not high; 2) During the heat preservation process of the water tank, the water temperature will inevitably drop, which will increase energy consumption. ;3) When installing water valves in the user's home, it is necessary to install a water mixing valve, which increases the cost of materials

7. When the general heating system uses the heat in the water tank, it is necessary to install a heat exchange coil inside the water tank to form a closed circuit with the floor heating coil or the radiator and the circulating water pump, which increases the difficulty of the production process of the water tank and occupies Tank volume

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