Overheat balancer used for heat pump water heater

Abstract

The invention is a superheated balancer used for heating supplying which makes use for energy and used for heat pump water heater in the field of air-condition technology, it includes: pressureproof metal cavity, heating material and insulated material, insulated material combine with pressureproof metal cavity to isolate that pressureproof metal cavity and environment exchange heating, inlet of pressureproof metal cavity connects with outlet of evaporator, heating material is airproofed in the pressureproof metal cavity tightly. The invention is installed between outlet of evaporator and thermometer bulb of thermostatic expansion valve, the temperature of refrigerant is more symmetrical by accumulating heat and strong heat conduction, the range of fluctuation is smaller. Due to the function of balance of superheated balancer, fluctuation of the temperature of outlet of evaporator or oscillation amplitude is smaller, thus, we can setup lower degree of superheat and enhance heat pump water heater's security and economical efficiency.

Description

technical field [0001] The invention relates to a device in the technical field of refrigeration and air conditioning, in particular to a superheat balancer for a heat pump water heater. Background technique [0002] Thermal expansion valve is a throttling component widely used in air-conditioning and refrigeration equipment. With the emergence of heat pump water heaters, thermal expansion valves have been applied to heat pump water heaters. In the case of mild climate, the thermal expansion valve can ensure the stable superheat of the evaporator outlet by adjusting the refrigerant flow rate, and make the system operate normally. However, once the ambient temperature is low in winter, due to the thermal expansion valve itself Inherent defect, in the process of self-adjustment, the superheat degree at the outlet of the evaporator will fluctuate greatly, even appear negative value, which will make the compressor suck liquid and seriously affect the life of the compressor. In ...

AI Technical Summary

Problems solved by technology

However, since the working mechanism of the thermal expansion valve in this design is exactly the same as that of the usual thermal expansion, and the inherent defects of the thermal expansion valve itself determine that on the one hand, it is necessary to try to reduce the value of the superheat when the environment is low temperature, and on the other hand On the one hand, it is also necessary to avoid superheat oscillation and fluid carrying, which cannot be realized at the same time

Therefore, in order to improve the performance of the thermal expansion valve in a low temperature environment, it is necessary to start with weakening the amplitude of the oscillation, and stabilize the outlet temperature of the evaporator through a certain device, so that the adjustment action of the thermal expansion valve is smooth, and finally achieve the goal of reducing the overshoot of the evaporator outlet. However, in the literature searched so far, there is no device that can improve the operating characteristics of the thermal expansion valve when the environment is low temperature

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