CN111735234A

CN111735234A - Refrigerator evaporator using water as refrigerant

Info

Publication number: CN111735234A
Application number: CN202010778770.4A
Authority: CN
Inventors: 娄开立; 高龙; 王新正; 娄伟; 楼雪薇; 吴钢
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2020-10-02

Abstract

A refrigerator evaporator using water as a refrigerant, characterized in that: the evaporator comprises an evaporator shell and an evaporator arranged in the evaporator shell and formed by a plurality of evaporation cells with barrel-shaped structures, wherein one end of each evaporation cell is provided with a high-pressure spray head, and the other end of each evaporation cell is provided with a water baffle; a refrigerant water spray header which uniformly sprays refrigerant water on the shell of the evaporation small chamber is arranged in the spray chamber steam above the evaporator; the bottom of the evaporator is provided with a corresponding pipe orifice for conveying the refrigerant water to a user main pipeline for connection.

Description

Refrigerator evaporator using water as refrigerant

Technical Field

The invention relates to a refrigerator evaporator using water as a refrigerant, in particular to a refrigerator evaporator using water as a refrigerant.

Background

The refrigerating evaporator with water as refrigerant has the refrigerant water evaporating to absorb the heat of refrigerant water and lower its temperature for refrigerating. The refrigerant water and the refrigerant water mainly exchange heat in a convection mode. Refrigerant water flows outside the pipe, and refrigerant water flows inside the pipe. How to obtain a higher heat transfer coefficient is the pursuit of the designer of the refrigerator.

The traditional lithium bromide absorption refrigerator using water as refrigerant only requires the evaporation of refrigerant water as much as possible, and the momentum of evaporated water vapor molecules is not considered. Therefore, the area and the heat exchange efficiency of the heat exchange pipe are considered in the design of the evaporator, namely how to enlarge the heat exchange area of the cooling water and improve the heat exchange efficiency are considered more.

Disclosure of Invention

The present invention is directed to the above-mentioned shortcomings of the prior art and to an evaporator for a refrigerator using water as a refrigerant.

The object of the invention can be achieved by the following technical measures:

the refrigerator evaporator using water as a refrigerant comprises an evaporator shell, and evaporators which are arranged in the evaporator shell and formed by a plurality of evaporation cells with barrel-shaped structures and arranged in a honeycomb shape, wherein one end of each evaporation cell is provided with a high-pressure spray head, and the other end of each evaporation cell is provided with a water baffle; a refrigerant water spray header which uniformly sprays refrigerant water on the shell of the evaporation small chamber is arranged in the spray chamber steam above the evaporator; the bottom of the evaporator is provided with a corresponding pipe orifice for conveying the refrigerant water to a user main pipeline for connection.

Furthermore, the evaporator is arranged in the hot-pressing refrigerator shell, the high-pressure spray head is communicated with a spray water system positioned outside the evaporator, and the spray water system is communicated with a spray water source positioned at the bottom of the hot-pressing refrigerator shell through a shielding water pump.

The working principle of the invention is as follows:

the refrigerant water is sprayed into the corresponding evaporation chamber from the high-pressure spray head at one end of the evaporation chamber, and the sprayed water is diffused into a plurality of molecular groups of fine particles due to large pressure difference and flows at high speed on the wall surface of the evaporation chamber. One part of the water molecule group flows tightly close to the inner wall and performs forced convection heat exchange with the refrigerant water flowing on the outer wall. The water molecule groups absorb the heat energy transferred from the wall surface and are vaporized into water vapor. A part of the water molecular groups are vaporized into water vapor by absorbing radiant heat emitted from the walls of the evaporation cell. Because the water phase is changed into water vapor, the heat exchange process does not influence the movement of water molecule groups and water vapor molecules. In the evaporation chamber, the water molecule groups and the water vapor molecules flow to the other end of the evaporation chamber along the movement mode and the movement speed of the raw water molecules. The other end of the small evaporation chamber is provided with a water baffle plate, water molecular groups are filtered in the water baffle plate, and water vapor molecules with higher momentum flow into the heater.

The evaporator of the invention is matched with a heater of hot compressed refrigerant water vapor. According to the requirement of the heater, the momentum of the water vapor molecules produced by the evaporator is far higher than that of the water vapor molecules produced by the evaporator in the traditional lithium bromide absorption refrigerator.

The evaporator is extruded by a water pump with higher pressure and then directly sprayed into an independent channel by a nozzle. Each nozzle of the honeycomb evaporator is provided with a special evaporation space, so that smooth flow of water vapor can be fully ensured, and the on-way resistance of the water vapor flow is reduced.

The invention is based on the thermodynamic properties of water and water vapor, wherein the boiling (i.e. evaporation) temperature of water is related to the pressure of the space where the water is located. The lower the pressure the lower the evaporation temperature. Water evaporation only absorbs heat energy and does not consume kinetic energy. According to the two thermal properties, the honeycomb type evaporator can be placed in a high-vacuum tank body, and then low-temperature high-power refrigerant steam can be produced.

The invention has the following beneficial effects:

because the evaporator is in a honeycomb structure consisting of a plurality of evaporation cells 1 in a cylindrical structure, the water vapor produced by the evaporator can meet the special requirements of a heater for heating the water vapor in a hot-pressing refrigeration cycle, and the water vapor has high momentum consistent with the pressure in the heater.

Drawings

Fig. 1 is a schematic diagram of the working principle of the present invention.

Fig. 2 is a side view of fig. 1.

In the figure: the device comprises an evaporation chamber 1, a high-pressure spray head 2, a spray water system 3, a shield water pump 4, a refrigerant water spray head 5, an evaporator shell 6 and a hot-pressing refrigerator shell 7.

Detailed Description

The invention will be further described with reference to the following examples (drawings):

as shown in fig. 1 and 2, the refrigerator evaporator using water as refrigerant of the present invention comprises an evaporator shell 6, an evaporator disposed in the evaporator shell and formed by a plurality of evaporation cells 1 with cylindrical structure and arranged in a honeycomb shape, and one end of each evaporation cell 1 is configured with a high pressure spray head 2, and the other end is provided with a water baffle; a refrigerant water spray header 5 which uniformly sprays refrigerant water on the shell of the evaporation small chamber 1 is arranged in the spray chamber steam above the evaporator; the bottom of the evaporator is provided with a corresponding pipe orifice for conveying the refrigerant water to a user main pipeline for connection.

Furthermore, the evaporator is arranged in the hot-pressing refrigerator shell 7, the high-pressure spray head 2 is communicated with a spray water system 3 positioned outside the evaporator, and the spray water system 3 is communicated with a spray water source positioned at the bottom of the hot-pressing refrigerator shell 7 through a shielding water pump 4.

In the working state of the evaporator, the refrigerant water enters from the main pipeline above the evaporator, is dispersed to the refrigerant water spray header 5 and is uniformly sprayed on the shell of the evaporation chamber to flow. After flowing through the small evaporation chamber in the evaporator shell, the refrigerant water is gathered at the bottom of the evaporator, and then is sucked by the refrigerant water bottom main pipe and conveyed to users. The spray water is pumped out by a shield water pump 4 at the bottom of a hot-pressing refrigerator shell 7 and enters a spray water system 3 under high pressure. Evenly distributed over the high-pressure spray header 2 of each evaporation cell 1. Because the spray water has higher pressure, the spray water is atomized into fine water molecule groups immediately after being sprayed from the high-pressure spray head 2. In the space of the evaporation chamber 1, the water uniformly adheres to the wall surface and flows, and forms forced convection heat exchange with refrigerant water, so that the heat of the refrigerant water is better absorbed and vaporized into water vapor.

Claims

1. A refrigerator evaporator using water as a refrigerant, characterized in that: the evaporator comprises an evaporator shell and an evaporator arranged in the evaporator shell and formed by a plurality of evaporation cells with barrel-shaped structures, wherein one end of each evaporation cell is provided with a high-pressure spray head, and the other end of each evaporation cell is provided with a water baffle; a refrigerant water spray header which uniformly sprays refrigerant water on the shell of the evaporation small chamber is arranged in the spray chamber steam above the evaporator; the bottom of the evaporator is provided with a corresponding pipe orifice for conveying the refrigerant water to a user main pipeline for connection.

2. A refrigerator evaporator using water as refrigerant according to claim 1, wherein: the evaporator is arranged in the hot-pressing refrigerator shell, the high-pressure spray head is communicated with a spray water system positioned outside the evaporator, and the spray water system is communicated with a spray water source positioned at the bottom of the hot-pressing refrigerator shell through a shielding water pump.