CN211552128U

CN211552128U - Accurate temperature control cooling circulator

Info

Publication number: CN211552128U
Application number: CN202020113290.1U
Authority: CN
Inventors: 颜厥枝
Original assignee: Wuxi Guanya Constant Temperature Refrigeration Technology Co ltd
Current assignee: Wuxi Guanya Constant Temperature Refrigeration Technology Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-09-22
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses an accurate accuse temperature cooling cycle ware, its structure includes circulating system and refrigerating system. The utility model has the advantages that: 1) the temperature control range is wide, and accurate temperature control can be well realized at any point in the temperature control range; 2) compared with variable frequency control, the temperature control method has the advantages that the flow and the temperature can be accurately controlled simultaneously, in the aspect of temperature control, the output proportion of the quick-opening valve can be controlled through PID operation in a hot gas bypass mode, and therefore the temperature can be accurately controlled; in the aspect of flow control, a bypass with an electric regulating valve is added in a circulating pipeline system, and the opening of the electric regulating valve can be controlled through PID operation, so that the flow can be accurately controlled; 3) the temperature can be directly reduced from 100 ℃, and the temperature of the return air can be controlled within 20 ℃; 4) the multi-point operation and model-free self-tree-building algorithm can be adopted, and the temperature control of a large-lag system is specially aimed at, so that the temperature of a lag target value can be controlled within +/-0.5 ℃ in a constant temperature manner.

Description

Accurate temperature control cooling circulator

Technical Field

The utility model relates to an accurate accuse temperature cooling cycle ware.

Background

For a common water chilling unit, two accurate temperature control modes are generally adopted, one is constant temperature control flow, and the other is constant flow control temperature. No matter which mode is adopted, the frequency conversion is often needed to be used for realizing the operation, the first mode is that a frequency conversion controller and a frequency conversion pump are added, and the second mode is that the frequency conversion controller and a frequency conversion compressor are added. Although the two control modes can achieve the purpose of accurate temperature control, relatively speaking, the manufacturing cost is high, the frequency conversion control is complex, the probability of failure is high, and the later maintenance cost is not low.

SUMMERY OF THE UTILITY MODEL

The utility model provides an accurate accuse temperature cooling cycle ware, its purpose aims at overcoming the above-mentioned not enough that prior art exists, realizes non-variable frequency control, reduces cost and later maintenance cost, and compact structure, energy-conservation, high-efficient, safe and reliable.

The technical solution of the utility model is as follows: the precise temperature control cooling circulator structurally comprises a circulating system and a refrigerating system,

the circulating system comprises an expansion tank, a heating pipe, a circulating pump and an evaporator, wherein the top of the expansion tank is connected with the heating pipe through a pipeline with an exhaust stop valve, the bottom of the expansion tank is connected with the heating pipe through a pipeline with a one-way valve, the heating pipe is connected with a heat-conducting medium inlet pipe, the heating pipe is connected with a first passage of the evaporator through a pipeline with the circulating pump, the first passage of the evaporator is connected with a heat-conducting medium outlet pipe with a flowmeter and a pressure sensor, and the heat-conducting medium inlet pipe and the heat-conducting medium outlet pipe are respectively provided with a temperature;

the refrigeration system comprises a compressor, an oil separator, an air-cooled condenser, a drying filter and a heat regenerator, wherein the compressor is respectively connected with the top and the bottom of the oil separator through pipelines, the top of the oil separator is connected with the air-cooled condenser through a pipeline, the air-cooled condenser is connected with the drying filter through a pipeline, the drying filter is connected with a first passage of the heat regenerator through a pipeline with an expansion valve, the first passage of the heat regenerator is connected with a second passage of an evaporator through a pipeline, the second passage of the evaporator is connected with the second passage of the heat regenerator through a pipeline, and the second passage of the heat regenerator is connected with the compressor through a pipeline.

Preferably, the expansion tank is provided with a liquid level meter, and the top of the expansion tank is provided with a liquid filling port.

Preferably, the heating pipe is connected with the heat-conducting medium outlet pipe through a pipeline with an electric regulating valve.

Preferably, a pipeline with a quick-opening valve, a copper ball valve and a silencer is connected between the pipeline between the oil separator and the air-cooled condenser and the pipeline between the first passage of the regenerator and the second passage of the evaporator.

Preferably, the heating pipe is a U-shaped light pipe, and the heating pipe is connected with the three-phase voltage regulator and the mechanical temperature protection switch.

The utility model has the advantages that: 1) the temperature control range is wide, and accurate temperature control can be well realized at any point in the temperature control range;

2) compared with variable frequency control, the temperature control method has the advantages that the accurate control of the flow and the temperature can be realized simultaneously, in the aspect of temperature control, the output proportion of the quick-opening valve can be controlled through PID operation in a hot gas bypass mode, and therefore the accurate control of the temperature is realized; in the aspect of flow control, a bypass is added in the circulating pipeline system, an electric regulating valve is arranged on the bypass, and the opening degree of the electric regulating valve can be controlled through PID operation, so that the flow can be accurately controlled;

3) the temperature can be directly reduced from 100 ℃, and the temperature of the return air can be controlled within 20 ℃;

4) the multi-point operation and model-free self-tree-building algorithm can be adopted, and the temperature control of a large-lag system is specially aimed at, so that the temperature of a lag target value can be controlled within +/-0.5 ℃ in a constant temperature manner, and the up-down frequent fluctuation is avoided.

5) Can well replace a variable frequency control system.

Drawings

Fig. 1 is a schematic structural diagram of the precise temperature control cooling circulator of the present invention.

In the figure, 1 is an expansion tank, 2 is a heating pipe, 21 is an electric control valve, 3 is a circulation pump, 4 is an evaporator, 5 is a compressor, 6 is an oil separator, 7 is an air-cooled condenser, 8 is a drying filter, 81 is an expansion valve, 9 is a regenerator, 10 is a quick-opening valve, 11 is a copper ball valve, and 12 is a muffler.

Detailed Description

The present invention will be described in further detail with reference to examples and embodiments.

As shown in fig. 1, the precise temperature control cooling circulator structurally comprises a circulating system and a refrigerating system.

The circulation system include expansion tank 1, heating pipe 2, circulating pump 3 and evaporimeter 4, pipe connection heating pipe 2 through taking the exhaust stop valve is passed through at 1 top of expansion tank, 1 bottom of expansion tank is through the pipe connection heating pipe 2 of taking the check valve, heating pipe 2 is connected heat-conducting medium and is advanced the pipe, heating pipe 2 is through the pipe connection 4 first passageways of taking circulating pump 3 evaporimeter, evaporimeter 4 first passageways connecting band flowmeter and pressure sensor's heat-conducting medium exit tube, heat-conducting medium advances to establish temperature sensor on pipe and the heat-conducting medium exit tube respectively.

The expansion tank 1 is provided with a liquid level meter and a liquid filling port at the top.

The heating pipe 2 is connected with a heat-conducting medium outlet pipe through a pipeline with an electric regulating valve 21.

The circulating system is a fully-closed system, oil mist does not exist at high temperature, moisture in air is not absorbed at low temperature, pressure cannot rise due to high temperature during operation of the system, and heat-conducting media are automatically supplemented at low temperature.

The heat conducting oil filling of the circulating system comprises the following steps: the heat conduction oil is injected into the expansion tank 1, the exhaust stop valve is opened, the internal circulation pump 3 is opened, the heat conduction oil is pumped into the system from the expansion tank 1, meanwhile, the air in the system is discharged, the air in the system is continuously discharged through the continuous injection of the heat conduction oil, and the exhaust stop valve is closed until the air in most parts of the system is discharged. So as to form a circulating system without contacting with air. (the first exhaust may have a little residual air in the system, which is carried out along the expansion process through several temperature raising and lowering processes.)

After the equipment is started, the circulating pump 3 can always run, the temperature of the medium outlet is detected through the temperature sensor arranged on the circulating pipeline, so that the running of the refrigeration compressor 5 is controlled, and meanwhile, the output proportion of the heating pipe 2 is adjusted through the three-phase voltage regulator, and the accurate temperature control is realized.

The refrigeration system comprises a compressor 5, an oil separator 6, an air-cooled condenser 7, a dry filter 8 and a heat regenerator 9, wherein the compressor 5 is respectively connected with the top and the bottom of the oil separator 6 through pipelines, the top of the oil separator 6 is connected with the air-cooled condenser 7 through a pipeline, the air-cooled condenser 7 is connected with the dry filter 8 through a pipeline, the dry filter 8 is connected with a first passage of the heat regenerator 9 through a pipeline with an expansion valve 81, the first passage of the heat regenerator 9 is connected with a second passage of an evaporator 4 through a pipeline, the second passage of the evaporator 4 is connected with the second passage of the heat regenerator 9 through a pipeline, and the second passage of the heat regenerator 9 is connected with the compressor 5 through a pipeline.

And pipelines with a quick-opening valve 10, a copper ball valve 11 and a silencer 12 are connected between a pipeline between the oil separator 6 and the air-cooled condenser 7 and a pipeline between a first passage of the regenerator 9 and a second passage of the evaporator 4.

In the refrigeration mode, the compressor 5 operates to compress the gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the refrigerant carried in the refrigerant steam is separated by the oil separator 6, the refrigerant returns to the compressor 5 through an oil return pipe, the refrigerant is condensed into a high-pressure liquid refrigerant through the air-cooled condenser 7, impurities and water are filtered out through the drying filter 8, the liquid refrigerant enters the throttling device (expansion valve), the throttled liquid refrigerant firstly passes through the heat regenerator 9, and is evaporated in the heat regenerator 9 to exchange heat with the gaseous refrigerant discharged from the evaporator 4, so that the return air temperature of the compressor 5 is not too high. In the refrigeration mode, when the temperature is reduced to be close to a set value, the hot gas bypass function starts to intervene to participate in the regulation of the refrigerating capacity, and the temperature control requirement is realized through the output proportion of the quick opening valve 10. The hot gas bypass can be manually adjusted through a copper ball valve 11, and a silencer 12 is arranged at the rear part, so that too much airflow sound is avoided in the hot gas bypass process.

The heating pipe 2 is a U-shaped light pipe, and the heating pipe 2 is connected with a three-phase voltage regulator and a mechanical temperature protection switch.

In the heating mode, the heating pipe 2 is arranged in the liquid storage tank by adopting a U-shaped light pipe, the output proportion of heating power is adjusted by a three-phase voltage regulator according to a set temperature value, and the heating pipe is effectively prevented from being burnt dry by being provided with a mechanical temperature protection switch.

All the above components are prior art, and those skilled in the art can use any model and existing design that can implement their corresponding functions.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.

Claims

1. The precise temperature control cooling circulator is characterized by comprising a circulating system and a refrigerating system,

the circulating system comprises an expansion tank (1), a heating pipe (2), a circulating pump (3) and an evaporator (4), wherein the top of the expansion tank (1) is connected with the heating pipe (2) through a pipeline with an exhaust stop valve, the bottom of the expansion tank (1) is connected with the heating pipe (2) through a pipeline with a one-way valve, the heating pipe (2) is connected with a heat-conducting medium inlet pipe, the heating pipe (2) is connected with a first passage of the evaporator (4) through a pipeline with the circulating pump (3), the first passage of the evaporator (4) is connected with a heat-conducting medium outlet pipe with a flowmeter and a pressure sensor, and the heat-conducting medium inlet pipe and the heat-conducting medium outlet pipe are respectively;

refrigerating system include compressor (5), oil separator (6), air-cooled condenser (7), dry-type filter (8), regenerator (9), top and bottom through pipe connection oil separator (6) respectively in compressor (5), pipe connection air-cooled condenser (7) are passed through at oil separator (6) top, air-cooled condenser (7) pass through pipe connection dry-type filter (8), dry-type filter (8) pass through the first passageway of pipe connection regenerator (9) of taking expansion valve (81), regenerator (9) first passageway passes through pipe connection evaporimeter (4) second passageway, evaporimeter (4) second passageway passes through pipe connection regenerator (9) second passageway, regenerator (9) second passageway passes through pipe connection compressor (5).

2. The precise temperature control cooling circulator of claim 1, wherein a liquid level meter is arranged on the expansion tank (1) and a liquid filling port is arranged at the top of the expansion tank.

3. The precise temperature control cooling circulator of claim 1, wherein the heating tube (2) is connected to the heat transfer medium outlet tube through a tube having an electrically controlled valve (21).

4. The precise temperature control cooling circulator of claim 1, wherein pipes with quick-opening valves (10), copper ball valves (11) and silencers (12) are connected between the pipes between the oil separator (6) and the air-cooled condenser (7) and between the first passage of the regenerator (9) and the second passage of the evaporator (4).

5. The precise temperature control cooling circulator of claim 1, wherein the heating tube (2) is a U-shaped light pipe, and the heating tube (2) is connected to a three-phase voltage regulator and a mechanical temperature protection switch.