CN201443869U

CN201443869U - double-loop evaporator

Info

Publication number: CN201443869U
Application number: CN2009200307832U
Authority: CN
Inventors: 单建锡; 李钢
Original assignee: Shandong Meilinda Renewable Energy Development Co Ltd
Current assignee: Shandong Meilinda Renewable Energy Development Co Ltd
Priority date: 2009-07-30
Filing date: 2009-07-30
Publication date: 2010-04-28
Anticipated expiration: 2019-07-30

Abstract

The utility model relates to a double-loop evaporator which comprises a first refrigerant loop and a second refrigerant loop, wherein the first refrigerant loop is connected between an air cooler and a regenerator, the second refrigerant loop is connected between an expansion valve and the regenerator, the first refrigerant loop is provided with a refrigerant inlet pipe and a refrigerant outlet pipe, the second refrigerant loop is provided with a refrigerant inlet pipe and a refrigerant outlet pipe, the first refrigerant loop can be arranged on the first row or any row of the windward side, and can be arranged into one row, or is arranged into two or more than two rows, the first refrigerant loop can be divided into two or more than two branches, and the refrigerant adopts carbon dioxide. The double-loop evaporator has reasonable structural design, and can achieve the purpose of circulating heating with high-temperature hot water (50 DEG C-90 DEG C) obtained through a carbon dioxide heat pump device.

Description

The double loop evaporimeter

One, technical field:

The utility model relates to a kind of associate member of heat pump assembly, specifically is a kind of double loop evaporimeter.

Two, background technology:

At present, the attention of the natural refrigerant carbon dioxide is nontoxic because of it, not flammable, ozone layer destroying index GDP is 0, global warming is dived value GWP is advantage such as 1 is subjected to more and more refrigeration industry, carbon dioxide be considered to heat pump working medium alternative in one of the most potential natural medium.The carbon dioxide heat-pump system relies on its particular performances, can produce the hot water more than 60 ℃ very easily, especially the temperature glide of CO 2 cross-critical system gas cooler end can mate preferably with temperature-variable heat source, is particularly suitable for domestic hot-water's heating.Even the good characteristic of carbon dioxide heat-pump system makes under the environment of low temperature, also can reach higher Energy Efficiency Ratio and hot water temperature.But it also has its limitation, and critical-temperature is 31 ℃, and the high-pressure side of systemic circulation is in nearly critical or supercriticality under the normal temperature cooling condition, and system pressure is very high, can reach more than the 100bar, and restriction loss is very big.

The critical piece of existing carbon dioxide heat-pump has: compressor, gas cooler, Intermediate Heat Exchanger, electric expansion valve, evaporimeter and gas-liquid separator.The heat pump flow process is: the low-pressure side carbon dioxide enters compressor, be compressed into high-pressure carbon dioxide gas, enter the gas cooler heat release then, hot water is heated, entering Intermediate Heat Exchanger through the cooled carbon dioxide of gas cooler further cools off, pass through the throttling step-down of electric expansion valve then, become gas-liquid mixture and enter evaporimeter, after the air heat exchange of the evaporimeter of flowing through, enter gas-liquid separator, and then enter Intermediate Heat Exchanger and further heat, absorbed compression by compressor again, thereby realize a complete circulation.

When the feed temperature that offers gas cooler is higher, as up to 50 ℃, CO ₂During the hot water heat exchange of cold-producing medium and 50 ℃, less be cooled,, thereby limited CO so heating efficiency is lower ₂Heat pump is in the application that needs hot water circuit heating place.

Three, summary of the invention:

The purpose of this utility model is exactly the defective that exists at prior art, provides a kind of and can realize the hydronic double loop of high-temperature-hot-water evaporimeter.

Its technical scheme is: the utility model comprises first refrigerant loop and second refrigerant loop, first refrigerant loop is connected between gas cooler and the regenerator, second refrigerant loop is connected between expansion valve and the regenerator, first refrigerant loop is provided with the cold-producing medium inlet pipe and cold-producing medium goes out pipe, second refrigerant loop is provided with the cold-producing medium inlet pipe and cold-producing medium goes out pipe, first refrigerant loop can be in the windward side first row, also can be any row, can be a row, also can be two rows or many rows, first refrigerant loop can be divided into two and above branch road, and described cold-producing medium is a carbon dioxide.

Effect of the present utility model is: reasonable in design, operation when temperature is low in the winter time, the air that enters this evaporimeter can be heated by first refrigerant loop, help the defrosting of heat pump assembly, and can reach the hydronic purpose of use carbon dioxide heat-pump device acquisition high-temperature-hot-water (50 ℃-90 ℃).

Four, description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is structural representations of a kind of embodiment of the utility model.

Five, the specific embodiment:

With reference to attached Fig. 1 and 2, the utility model comprises the first refrigerant loop A and the second refrigerant loop B, the first refrigerant loop A is connected between gas cooler 2 and the compressor 1, the second refrigerant loop B is connected between expansion valve 5 and the compressor 1, the first refrigerant loop A is provided with cold-producing medium inlet pipe E and cold-producing medium goes out to manage F, the second refrigerant loop B is provided with cold-producing medium inlet pipe C and cold-producing medium goes out to manage D, the first refrigerant loop A can be in the windward side first row, also can be any row, can be a row, also can be two rows or many rows, the first refrigerant loop A can be divided into two and above branch road, and described cold-producing medium is a carbon dioxide.

In the use, the HTHP carbon dioxide coolant that compressor 1 is discharged enters gas cooler 2 heat hot water, the carbon dioxide coolant that comes out from gas cooler 2 enters evaporimeter 3 and further cools off, the carbon dioxide coolant that comes out from evaporimeter 3 enters Intermediate Heat Exchanger 4 and carries out heat exchange, the carbon dioxide coolant that comes out from middle heat exchanger 4 passes through electric expansion valve 5 throttling step-downs, become gas-liquid mixture, the carbon dioxide coolant that comes out from electric expansion valve 5 enters evaporimeter 3 absorption heats, the carbon dioxide coolant that comes out from evaporimeter 3 enters gas-liquid separator 6, the carbon dioxide coolant that comes out from gas-liquid separator 6 enters Intermediate Heat Exchanger 4 and is heated, the carbon dioxide coolant that comes out from middle heat exchanger 4 is absorbed by compressor 1, realizes that one complete heats circulation.

Claims

1. double loop evaporimeter, comprise first refrigerant loop and second refrigerant loop, it is characterized in that: first refrigerant loop is connected between gas cooler and the regenerator, second refrigerant loop is connected between expansion valve and the regenerator, first refrigerant loop is provided with the cold-producing medium inlet pipe and cold-producing medium goes out pipe, and second refrigerant loop is provided with the cold-producing medium inlet pipe and cold-producing medium goes out pipe.

2. double loop according to claim 1 evaporimeter, it is characterized in that: first refrigerant loop can be in the windward side first row, can be a row also any row, also can be two rows or many rows, first refrigerant loop can be divided into two and above branch road.

3. double loop according to claim 1 evaporimeter is characterized in that: described cold-producing medium is a carbon dioxide.