JP2826631B2 - Heat exchange device for direct expansion refrigeration system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a type of direct expansion refrigeration.
The system is directly applied to fluid cooling devices such as water coolers.
Contact expansion refrigeration systems, as well as other similar
The present invention relates to a device that is used to generate a cooling operation.

[0002]

2. Description of the Related Art A system applied to a device for cooling a fluid is disclosed.
The system is filled with liquid (Liquid over-feedi
ng) and a direct expansion type.
The stem is relatively complex, which results in extra cooling efficiency
Except for required products, direct inflatable
You. A direct inflatable system is easier than a full one
However, the cooling efficiency is low and therefore simple and high
Can be used for water coolers with cooling efficiency and similar products
There was a need for a refrigeration system.

FIG . 1 shows a kind of traditional and classical
This is a chiller system for a typical water cooler,
-Type expansion valve (5) and a steam valve connected to one expansion valve (5).
The generator (1) is connected to the refrigerant outlet (13) of the evaporator (1).
One compressor (3), and a compressor (3) and an expansion valve
A heat exchanger (4) connected to (5) is included. Among them
The temperature sensor (51) of the expansion valve (5), for example,
A steam detector is provided near the outlet (13) of the generator (1) to detect steam.
Due to the superheated temperature of the generator (1), the refrigerant passes through the expansion valve (5)
To control the flow rate. The expansion valve (5) is in the refrigerant pipe (47).
Liquid refrigerant is introduced into the evaporator (1), and the liquid refrigerant is vaporized.
Chilled water during the power generation process (when this system is applied to chilled water
B) to reduce the temperature of the cold water. This
The water that has passed through the evaporator (1) is cooled and the temperature decreases.
You. In comparison, the liquid refrigerant is such that the refrigerant pipe (12) heats water.
When absorbing and reaching the outlet of the evaporator (1), the liquid refrigerant is already
It is completely evaporated and overheated. Temperature sensor (51)
By the action, as described above, the outlet (1) of the evaporator (1)
The temperature of 3) is detected, and the liquid refrigerant further operates the expansion valve (5).
Adjust the flow through. This is mainly due to the evaporator (1)
If the refrigerant in the mouth is not completely evaporated and heated,
The medium is drawn from the suction pipe and sent to the compressor (3).
This is to cause damage to the inside of the compressor (3) when it is damaged.

[0004] As is well known, the thermal conductivity coefficient of the gaseous state is different from that of the liquid state.
Lower than the gaseous mixture, and the heat conduction of the gaseous refrigerant
The number is lower than the heat transfer coefficient of the saturated refrigerant. Therefore, if steam
If the generator is not completely gaseous and does not overheat the refrigerant, heat exchange
You should be able to increase the rate. This is the traditional
The direct expansion refrigeration system has to be overcome for a long time
There was no problem.

[0005]

SUMMARY OF THE INVENTION The present invention provides a kind of liquid state.
/ Connect the gas separator directly to the outlet of the cold soot in the evaporator,
Fluid that increases the heat exchange rate without completely vaporizing the refrigerant of the generator
It is an object to provide a refrigeration system.

[0006] The present invention is next based on a special heat exchange device (hea).
t exchange device)
High-pressure gaseous refrigerant (refrigerant v)
apor) is cooled in the upper half of the heat exchanger to a liquid state,
Separately, a liquid / gas separator (vap) is provided in the lower half of the heat exchanger.
or / liquid separator)
Oil-rich liquid refrigerant (oil-rich liquid)
evaporate in the tubes of the heat exchanger
And the cooled liquid refrigerant described above is housed in a heat exchanger.
Fluid refrigeration system for subcooling
The task is to provide a stem.

The present invention further provides a single temperature sensor (t
emperature sensor) refrigeration system
The expansion valve (expansion valve)
Oil-impregnated liquid after passing through the secondary heat exchange of the heat exchanger.
It is an object to detect the temperature of a refrigerant.

[0008]

SUMMARY OF THE INVENTION The present invention provides a fluid cooling device.
Or it is applied to other cooling equipment, Rise of one temperature-sensitive
With the expansion valve, the refrigerant sent from one evaporator is converted into liquid / air state
Maintain both states, and mix saturated liquid / gas at the evaporator outlet.
The combined refrigerant is separated, and no saturated gaseous refrigerant and no oil-containing liquid refrigerant,
Send the saturated gaseous refrigerant to the intake pipe of one compressor,
The oil-liquid refrigerant is sent to one heat exchange device and passed through the heat exchange device.
Evaporates oil-containing liquid refrigerant into superheated steam, and
Feeding into the intake pipe, a high pressure Kitaihiya compressed by the compressor
The medium is a liquid refrigerant that has been secondarily cooled through a heat exchanger, and
After that, it is sent to the above-mentioned temperature-sensitive expansion valve.

According to the present invention, one evaporator is used to supply one refrigerant.
It has a port and one refrigerant outlet, and the refrigerant has a liquid /
As to advance the heat exchanger in gaseous both states coexisting, one
Liquid / gas separator with one gas outlet and one liquid outlet
It has a mouth and one inlet, of which the inlet is the evaporator described above
And one compressor, one inlet
Has one outlet and of which the inlet liquid respectively on predicate
Air outlet of the air / air separator and low pressure air cooling of the heat exchanger
A heat exchanger connected to the medium outlet,
Is the low-pressure liquid refrigerant inlet, and the liquid / gas separation described above
And one low-pressure gaseous refrigerant
At the mouth, one connected to the inlet of the aforementioned compressor and one
The outlet of the secondary cooling liquid refrigerant is connected to the inlet of the expansion valve described above.
And the low-pressure liquid refrigerant of the heat exchanger described above.
The inlet is connected to the low-pressure gaseous refrigerant outlet of the heat exchanger,
A heat exchanger is formed, and a high-pressure gaseous refrigerant that has passed through the heat exchanger is introduced.
The fluid in the mouth undergoes heat exchange with the secondary heat exchanger and then heat
From the high-pressure secondary cooling liquid refrigerant outlet of the exchange unit to the expansion valve
Send to

[0010] The above heat exchanger is located above the secondary heat exchanger.
One primary heat exchanger to be included in the primary heat exchanger
Has a number of bypass cooling water pipes and the secondary heat exchange described above.
The exchanger has a number of refrigerant pipes and the liquid state of the liquid / gas state separator.
Provided for the passage of refrigerant.

The temperature sensor for the expansion valve is a secondary exchanger.
Is provided at the outlet, and the temperature of the outlet is detected to connect the above-described expansion valve.
Feedback is made to adjust the flow rate of the refrigerant.

The evaporator of the present invention is provided in one container.
Can be

[0013]

According to the present invention, the refrigerant pipe of the evaporator passes through the pipe.
(Conduit) first through a liquid / gas separator
After that, it is connected to the compressor, which causes the refrigerant in the evaporator to
Heat exchange proceeds under the coexistence state of both gaseous and gaseous phases. Soshi
Connect one end of one specially designed heat exchanger before the evaporator.
The other end is connected to the expansion valve and the other end is the outlet pipe of the compressor.
Connect with In the heat exchanger, the traditional heat exchanger
In addition to providing a cooling water pipe structure, one secondary heat exchanger and liquid state
/ Connect the oil-containing liquid refrigerant pipe of the gaseous separator,
Vaporizes the oil-impregnated liquid refrigerant and is thus sent from the compressor
Exchanging heat with the cooling water pipe in the heat exchanger without high-pressure gas refrigerant
Cooled to a high-pressure liquid refrigerant, and further cooled to the secondary
A liquid refrigerant cooled through heat exchange.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is applied to water coolers and other cooling systems.
It can be applied to analogs. As shown in FIG.
In addition, the inlet pipe (111) and the outlet pipe (11) of the container (11)
2) How to promote heat exchange with the evaporator (1) in the vessel
To indicate whether it receives materials to be carried out, such as water, air, etc.
And the substance is supplied from the inlet pipe (111) to the evaporator.
(1) and exchange heat with the refrigerant in the refrigerant pipe (12).
And then discharged from the outlet pipe (112). this
Therefore, the container (11) is a water cooler, an air container, or
Heat exchange to preserve or pass other suitable fluids
Replacement container.

The system of the present invention and a traditional direct expansion steam
A similar part of the generator system is likewise using one evaporator
And a refrigerant pipe (12) and a refrigerant pipe (12) therein.
Have a passage or container for a substance that can proceed with heat exchange
It is. Substances that proceed with heat exchange should be
After entering from the mouth pipe (111), from the exit pipe (112)
Is discharged. Evaporator at the outlet end of the temperature-sensitive expansion valve (5)
The inlet end of the refrigerant pipe of (1) is connected. Heat exchange device (4)
Is connected to the inlet end of the expansion valve (5), and one compressor (3)
Is disposed between the heat exchange device (4) and the evaporator (1), and
Connected to the heat exchange device (4) and evaporator (1) via respective pipelines
I do.

The system of the present invention further comprises one liquid / gas
State separator (2), which is a refrigerant pipe of the evaporator (1).
Connection between outlet line (13) of (12) and compressor (3)
I do. The liquid / gas separator (2) has one gaseous refrigerant outlet
Pipe (21) (Segment) and one oil-containing liquid refrigerant outlet
It has a mouth tube (22). The gaseous refrigerant outlet pipe (2
1) is welded to the intake pipe (31) of the compressor (3),
The refrigerant outlet pipe (22) is connected to the secondary heat exchanger in the heat exchanger (4).
It is connected to the inlet pipe (45) of the exchanger (43). in this way
Then, the oil-containing liquid refrigerant is directly transferred to the intake pipe (3) of the compressor (3).
1) Refrigerant pipe without passing into and in the evaporator (1)
(12) always without the need to superheat the refrigerant in, Tadaekitai
/ It is possible to increase thermal conductivity just by showing both air
Wear.

[0017] As shown in FIG. 2 and FIG.
A special heat exchange device (4) in the stem provides one primary heat exchange
Exchanger (41) and the bottom of the primary heat exchanger (41).
Secondary heat exchanger (43), of which the primary heat exchanger
(41) has a number of bypass cooling systems similar to traditional heat exchangers
It has a drainage pipe (42).
), So that the outlet pipe (32) of the compressor (3)
The high-pressure gaseous refrigerant sent out from the primary heat exchanger (41)
And heat exchange proceeds with the cooling water pipe (42).
Refrigerant that coexists in both liquid and gaseous state
The second heat exchange proceeds by entering the heat exchanger (43).
In the secondary heat exchanger (43), a number of refrigerant pipes (44) (FIG.
2 only one is represented), and the liquid state
/ The oil-containing liquid refrigerant sent from the gas separator (2)
The pipes (45) are fed into each refrigerant pipe (44),
Heat exchange with refrigerant in both liquid and gaseous state in heat exchanger (43)
The liquid refrigerant in the refrigerant pipe (44).
After vaporization, the suction pipe of the compressor (3) is passed through the outlet pipe (46).
Refrigerant that is sent to (31) and simultaneously coexists in both liquid and gaseous state
Is cooled again to a liquid state, and then is passed through a pipe (47).
Send to expansion valve (5).

[0018] The expansion valve (5) in the system of the present invention
Temperature sensor (51), for example, thermo bulb or others
Using a heat exchanger (4)
Detects the temperature of the outlet pipe (46) of the secondary heat exchanger (43)
Then, the change in the temperature causes the refrigerant flow rate of the expansion valve (5) to change.
Adjust Generally, the higher the temperature, the more the refrigerant flows.
The amount is larger, and vice versa.

[0019]

The refrigerant in the evaporator in the refrigeration system of the present invention
Does not need to be overheated and completely evaporated;
Can proceed under the condition of coexistence
Can be increased. In the present invention, the liquid refrigerant passes through an evaporator.
To prevent direct entry into the compressor after
The liquid refrigerant in the gaseous separator undergoes heat exchange in a heat exchanger.
After being in a gaseous state, it is sent further into the compressor,
The refrigerant vaporization process is based on the high-pressure
The refrigerant is immediately radiated to be in a liquid state. Expansion valve of the present invention
Liquid refrigerant is sent to the traditional heat exchanger through secondary heat exchange.
The temperature will be lower than the cold temperature. As a result, heat exchange of the evaporator
It is effective to increase the conversion rate.

[Brief description of the drawings]

FIG. 1 is a system diagram of a conventional direct expansion type evaporator.

FIG. 2 is a system diagram of the direct expansion type evaporator of the present invention.

FIG. 3 FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2 of the present invention.
is there.

[Description of Signs ] (1) Evaporator (2) Liquid / gas state separator (3) Compressor (4) Heat exchange device (5) Expansion valve (11) Container
(12) Refrigerant tube (13) Outlet line (21) Air- state refrigerant outlet tube ( 22) Oil- containing liquid-state refrigerant outlet tube (31) Intake tube (3)
2) Outlet pipe (41) Primary heat exchanger (42) Cooling water pipe (43) Secondary heat exchanger (44) Refrigerant pipe (45) Inlet pipe (46) Outlet pipe
(47) Pipe (51) Temperature sensor (111) Inlet pipe (112)
Outlet pipe

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hu Yongzhu, No. 195, No. 195, Fourth Section, Nakagyo Road, Bhudong Township, Hsinchu County, Taiwan (56) References JP-A 1-277175 (JP, A) 41059 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F25B 1/00 331 F25B 39/04

Claims (3)

(57) [Claims] 1. A heat exchange device for a direct expansion refrigeration system having a hollow main body, a primary heat exchanger 41 therein, and a secondary heat exchanger located below the primary heat exchanger 41. The heat exchanger 43 is provided, the primary heat exchanger 41 is provided with a plurality of cooling pipes, and the secondary heat exchanger 43 is provided with a plurality of refrigerant pipes for passing the liquid refrigerant of the liquid / gas separator, The high-temperature and high-pressure gaseous refrigerant supplied from the compressor 3 is drawn into the upper part of the main body, and the primary heat exchanger 41 first cools the high-temperature and high-pressure gaseous refrigerant into a high-temperature liquid refrigerant, and the secondary heat exchange. Vessel 4
After the liquid refrigerant 3 is immersed in the high-temperature liquid refrigerant and the liquid refrigerant passing through the secondary heat exchanger 43 absorbs latent heat and evaporates, the compressor 3
And the high-temperature liquid refrigerant in the heat exchange device main body emits latent heat to be sent to the expansion valve 5 after the temperature has dropped, and the heat exchange device of the direct expansion refrigeration system having the above configuration . 2. The heat exchange device for a direct expansion refrigeration system according to claim 1, wherein the cooling pipe is a bypass cooling water pipe. 3. The heat exchange device for a direct expansion refrigeration system according to claim 1, wherein a device for detecting a temperature change is provided at an outlet of the secondary heat exchanger 43.