CN2814214Y - Direct evaporating type cold accumulator - Google Patents

Abstract

The direct evaporative cold storage device belongs to the field of energy and environmental protection. It is composed of working fluid, evaporating coil and other components. Its function is to cancel the intermediate cold transfer link of refrigerant in the cold storage device of the refrigeration system, so that the cold storage system is simpler and more convenient to install, maintain and operate.

Description

Direct evaporative cold storage device

Technical field:

The name of the utility model is a direct evaporative cold storage device, which belongs to the field of energy and environmental protection.

Background technique:

The cold storage devices that are widely used at present are mostly cold storage devices used in air conditioners, which are divided into two types: water cold storage and phase change cold storage. The latter uses the phase change heat when pure water solidifies to store cold, and its cold storage temperature is zero, so the cooling temperature is also above zero, which is only suitable for air conditioning cold storage, and it is difficult to meet the requirements of low-temperature cold storage in industrial production processes . Most of these devices use brine to transfer cooling capacity between the refrigeration system and the cold storage system, which will inevitably increase the brine tank, brine pump and corresponding pipelines, valves and heat exchangers, etc., so that the cold storage The system becomes very complex.

Purpose of the invention:

In order to solve the deficiencies of the prior art, the utility model will provide a direct evaporative cold storage device without a brine tank and a brine pump.

Invention content:

The utility model adds a liquid storage tank and an evaporating coil to the traditional refrigeration system, so as to directly cool the cold storage medium in the water tank to the phase change temperature and directly carry out phase change latent heat storage, which can reduce the amount of refrigerant in the water tank and the cooling capacity. Agent pumps and corresponding pipelines greatly simplify the system. The evaporating coil is placed in the cold storage tank, and its inlet is connected with two parallel expansion valves, and the inlets of these two expansion valves are connected with the pipeline from the large liquid storage tank, and the outlet of the evaporating coil is also divided into two One way goes through the shut-off valve to use the cooler and the other way is connected to the inlet of the solenoid valve and then connected to the inlet of the compressor through the shut-off valve; the inlet of the liquid storage tank is connected to the outlet of the cooler through the shut-off valve, and Its outlet is connected with the inlet of the booster pump after another cut-off valve.

Description of drawings:

Figure 1 is a direct evaporative cold storage device. Among them: 1-cooler; 2-stop valve (c, e, g); 3-liquid storage tank; 4-booster pump; 5-condenser; 6-solenoid valve (K1, K2, K3); 7 - large liquid storage tank; 8 - compressor; 9 - expansion valve (a, b); 10 - cold storage water tank; 11 - cold storage working medium; 12 - evaporation coil.

The inlet of the cooler 1 is connected to the outlet of the evaporating coil 12 through the stop valve d, the outlet of the cooler 1 is connected to the liquid storage tank 3 through the stop valve c, and the other branch pipe drawn from the liquid storage tank passes through the stop valve e is connected to the inlet of the booster pump 4, and its outlet is connected to the large liquid storage tank 7 through the stop valve f, and the large liquid storage tank is also communicated with the condenser 5 through the electromagnetic valve K3; There are also two pipelines connected in parallel on the large liquid storage tank, one pipeline is equipped with expansion valve a, and the other pipeline is equipped with expansion valve b and the solenoid valve K1 connected with it. The outlet pipeline of the evaporating coil 12 is divided into two routes for working fluid: one route communicates with the cooler 1 through the shut-off valve d; the other communicates with the condenser 5 through the solenoid valve K2, the shut-off valve g, and the compressor 8, and the condenser The outlet of 5 is also connected with the large liquid storage tank through the electromagnetic valve K3.

Implementation use case:

Figure 1 is a system diagram of an ammonia direct evaporative cold storage device in a beer refrigeration station. Part of the ammonia vapor flowing out from the evaporating coil 12 goes to the cooler for cooling, and the other part passes through K2, the stop valve g enters the inlet of the ammonia compressor, and the compressed high-pressure working medium ammonia gas is condensed into a liquid in the condenser Ammonia then flows into the large liquid storage tank through K3 for storage. The liquid working fluid ammonia discharged from the large liquid storage tank is in the cold storage condition: K1 is closed, and the working fluid enters the evaporation coil after being throttled by the expansion valve a. At this time, the shut-off valve d is off and K2 and K3 are on, and the compressor is working; in the cooling condition: K1 is on, and the ammonia liquid enters the evaporation coil through K1 and expansion valve b, and then goes through the stop valve d to use the cooler for cooling. When K2 and K3 are closed, the compressor is disabled. And the working medium in the other parallel branch is cooled in the cooler and becomes liquid ammonia, then flows into the liquid ammonia booster pump through the shut-off valve c, the liquid storage tank, is pressurized, and returns to the liquid ammonia through another shut-off valve f. The cooling cycle is completed in the large liquid ammonia tank.

Claims (1)

1. direct vaporation-type cold-storage device, it is characterized in that having increased receiver and evaporation coil by forming with cooler, receiver, booster pump, condenser, magnetic valve, big receiver, compressor, expansion valve, cold-storage water tank, cold-storage working substance and evaporation coil in traditional refrigeration system; Evaporation coil places the cold-storage water tank, and its inlet communicates with the expansion valve of two parallel connections and the inlet of these two expansion valves all links with pipeline from big receiver; The outlet of evaporation coil also is divided into two-way, and one the tunnel goes behind stop valve that another road and electromagnetic valve entrance are connected after stop valve and suction port of compressor link with cooler; And the inlet of receiver through stop valve with link with the outlet of cooler, and its inlet that exports behind another stop valve with booster pump is connected.

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