CN201744283U

CN201744283U - Refrigerated type drier with high and low pressure protection function

Info

Publication number: CN201744283U
Application number: CN201020210452XU
Authority: CN
Inventors: 陈蓉; 王世金
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-25
Filing date: 2010-05-25
Publication date: 2011-02-16
Anticipated expiration: 2020-05-25

Abstract

The utility model relates to the technical field of driers, in particular to a refrigerated type drier with a high and low pressure protection function, comprising a refrigerant compressor, a condenser for cooling refrigerant and a refrigerant evaporator for cooling air, wherein the refrigerant compressor, the condenser and the refrigerant evaporator are sequentially connected to form a loop through delivery pipelines, the condenser is a water cooled condenser or an air cooled condenser, the refrigerant compressor is electrically connected with a high and low pressure protection switch, the high pressure end of the high and low pressure protection switch is connected with a refrigerant outlet of the refrigerant compressor, and the low pressure end of the high and low pressure protection switch is connected with a refrigerant inlet of the refrigerant compressor; and when the pressure of the refrigerant output by the refrigerant compressor is higher or lower than a set value, the high and low pressure protection switch can automatically cut off a circuit to shut down the refrigerant compressor so that the function of security protection can be played, and the refrigerated type drier with the high and low pressure protection function can prevent the fluctuation of pressure of the refrigerant and plays the role of high and low pressure protection for the refrigerant compressor, thereby being safe in running.

Description

Freezing type drier with high-low pressure protection

Technical field:

The utility model relates to the drying machine technical field, refers in particular to the freezing type drier with high-low pressure protection.

Background technology:

Usually the compressed air that enters the air net all contains hundred-percent water vapour, and these steam just can condense when air cools off, and this not only can destroy compressed air system, also can cause damage to final products.For satisfying the equipment compressed-air actuated requirement of low moisture, employing adds the way of filter in the follow-up pipeline of drying machine, grit in the compressed air, oil droplet, water droplet can be dependent on high efficiency particulate air filter and remove, but the filter core in the filter works hardly to vaporous water, steam, the oil gas of the central overwhelming majority must be reduced to certain dewpoint through freezing processing, and forming liquid state can effectively remove.Freezing type drier is exactly according to the freeze drying principle, to be cooled to certain dew-point temperature from the saturated compressed air that air compressor comes out, condensation goes out most aqueous water and carries dirt secretly and oil, discharges after gas-liquid separator separates, thereby reaches the function of dry decontamination.

Existing freezing type drier includes the condenser of cold medium compressor, cooling refrigerant, the refrigerant evaporator of cooling air, the electric cabinet of control circuit; cold medium compressor, condenser, refrigerant evaporator are linked in sequence by transfer pipeline and form the loop; the refrigerant pressure oscillation of cold medium compressor input and output is bigger; the high-low pressure imbalance; but existing freezing type drier is not effectively protected facility; the easy hypertonia of refrigerant of cold medium compressor output and the easy hypotony of refrigerant of input; damage cold medium compressor easily, move dangerous.

The utility model content:

The purpose of this utility model is exactly to provide a kind of freezing type drier with high-low pressure protection that prevents refrigerant pressure oscillation, the safe operation of protection cold medium compressor at the deficiency of prior art existence.

To achieve these goals; the technical solution adopted in the utility model is: the freezing type drier with high-low pressure protection; it includes cold medium compressor; the condenser of cooling refrigerant; the refrigerant evaporator of cooling air; cold medium compressor; condenser; refrigerant evaporator is linked in sequence by transfer pipeline and forms the loop; condenser is water cooled condenser or air-cooled condenser; cold medium compressor is electrically connected with the high-low pressure protection switch; the high-pressure side of high-low pressure protection switch is connected with the refrigerant exit of cold medium compressor, and the low-pressure end of high-low pressure protection switch is connected with the refrigerant of cold medium compressor inlet.

Be connected with the refrigerant low-pressure meter on the pipeline between the refrigerant exit of described refrigerant evaporator and the refrigerant of the cold medium compressor inlet.

Be connected with the refrigerant high pressure gauge on the pipeline between the refrigerant inlet of described refrigerant evaporator and the refrigerant exit of condenser.

Be connected with hot gas bypass valve between the refrigerant exit of described cold medium compressor and the refrigerant of the refrigerant evaporator inlet.

Be connected with drier on the pipeline between the refrigerant inlet of described refrigerant evaporator and the refrigerant exit of condenser.

It also includes the air heat exchange machine of band damp-heat air inlet, damp-heat air outlet, cold dry air inlet, cold dry air outlet, the damp-heat air outlet of air heat exchange machine is communicated with the air intake of refrigerant evaporator, is connected with moisture trap between the cold dry air inlet of the air outlet slit of refrigerant evaporator and air heat exchange machine.

The damp-heat air inlet of described air heat exchange machine is connected with precooler.

The bottom of described moisture trap is provided with automatic water trap.

The utility model beneficial effect is: the utility model includes cold medium compressor; the condenser of cooling refrigerant; the refrigerant evaporator of cooling air; cold medium compressor; condenser; refrigerant evaporator is linked in sequence by transfer pipeline and forms the loop; condenser is water cooled condenser or air-cooled condenser; cold medium compressor is electrically connected with the high-low pressure protection switch; the high-pressure side of high-low pressure protection switch is connected with the refrigerant exit of cold medium compressor; the low-pressure end of high-low pressure protection switch is connected with the refrigerant of cold medium compressor inlet; when the refrigerant pressure of cold medium compressor output is lower than setting value above the refrigerant pressure that sets value or import; the high-low pressure protection switch will automatic shutdown circuit; make the cold medium compressor parking and play the safeguard protection effect; the utility model can prevent the refrigerant pressure oscillation; cold medium compressor is played height; low-voltage variation, security of operation.

Description of drawings:

Fig. 1 is a structure principle chart of the present utility model.

The specific embodiment:

Below in conjunction with accompanying drawing the utility model is further described, see shown in Figure 1, the utility model includes the condenser of cold medium compressor 1, cooling refrigerant, refrigerant evaporator 2, air heat exchange machine 7, the precooler 5 of cooling air, cold medium compressor 1, condenser, refrigerant evaporator 2 are linked in sequence by transfer pipeline and form the loop, and condenser is water cooled condenser 3 or air-cooled condenser 4.

Cold medium compressor 1 is electrically connected with high-low pressure protection switch 6, and the high-pressure side of high-low pressure protection switch 6 is connected with the refrigerant exit of cold medium compressor 1, and the low-pressure end of high-low pressure protection switch 6 is connected with the refrigerant inlet of cold medium compressor 1.When the refrigerant pressure of cold medium compressor 1 output surpassed high-low pressure protection switch 6 high pressure set points, the contact of the microswitch high-pressure side of high-low pressure protection switch 6 disconnected, and cut off circuit, and compressor stops; When the refrigerant pressure of cold medium compressor 1 input drops to when being lower than high-low pressure protection switch 6 low pressure set points; the contact of the microswitch low-pressure end of high-low pressure protection switch 6 disconnects; cut off circuit; cold medium compressor 1 stops; otherwise then cold medium compressor 1 running of above situation; be that the refrigerant pressure of cold medium compressor 1 output is when dropping to the high pressure set point gradually; the refrigerant pressure of cold medium compressor 1 input goes back up to going up in limited time of low pressure set point gradually; the contact closure of the microswitch of high-low pressure protection switch 6; connect circuit, cold medium compressor 1 restarts running.When the utility model is lower than setting value at the refrigerant pressure of cold medium compressor 1 output above the refrigerant pressure that sets value or import; high-low pressure protection switch 6 will automatic shutdown circuit; make cold medium compressor 1 parking and play the safeguard protection effect; the utility model can prevent the refrigerant pressure oscillation; cold medium compressor 1 is played high and low pressure protection, security of operation.

Be connected with refrigerant low-pressure meter 9 on the pipeline between the refrigerant inlet of the refrigerant exit of refrigerant evaporator 2 and cold medium compressor 1, can indicate the refrigerant pressure of the refrigerant porch of cold medium compressor 1 in real time, be connected with refrigerant high pressure gauge 10 on the pipeline between the refrigerant inlet of refrigerant evaporator 2 and the refrigerant exit of condenser, can indicate the refrigerant pressure at the refrigerant exit place of cold medium compressor 1 in real time.

Be connected with hot gas bypass valve 11 between the refrigerant inlet of the refrigerant exit of cold medium compressor 1 and refrigerant evaporator 2.Be connected with drier 12 on the pipeline between the refrigerant inlet of refrigerant evaporator 2 and the refrigerant exit of condenser.

Have damp-heat air inlet 71 on the air heat exchange machine 7, damp-heat air outlet 72, cold dry air inlet 73, cold dry air outlet 74, the damp-heat air of air heat exchange machine 7 outlet 72 is communicated with the air intake of refrigerant evaporator 2, be connected with moisture trap 8 between the cold dry air inlet 73 of the air outlet slit of refrigerant evaporator 2 and air heat exchange machine 7, moisture trap 8 adopts whirlwind separator, condensed water thoroughly can be separated from air, and prevent that under various flow conditions liquid moisture from taking out of with compressed air, keep operation efficiently, reach the preferable drying purpose that dewaters.

The damp-heat air inlet 71 of air heat exchange machine 7 is connected with precooler 5, and the damp-heat air that enters is cooled off in advance, improves air freezing dry decontamination effect.The bottom of moisture trap 8 is provided with automatic water trap 13.

Certainly, the above only is a better embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.

Claims

1. the freezing type drier that has the high-low pressure protection; it includes cold medium compressor (1); the condenser of cooling refrigerant; the refrigerant evaporator (2) of cooling air; cold medium compressor (1); condenser; refrigerant evaporator (2) is linked in sequence by transfer pipeline and forms the loop; it is characterized in that: described condenser is water cooled condenser (3) or air-cooled condenser (4); cold medium compressor (1) is electrically connected with high-low pressure protection switch (6); the high-pressure side of high-low pressure protection switch (6) is connected with the refrigerant exit of cold medium compressor (1), and the low-pressure end of high-low pressure protection switch (6) is connected with the refrigerant inlet of cold medium compressor (1).

2. the freezing type drier with high-low pressure protection according to claim 1 is characterized in that: be connected with refrigerant low-pressure meter (9) on the pipeline between the refrigerant inlet of the refrigerant exit of described refrigerant evaporator (2) and cold medium compressor (1).

3. the freezing type drier with high-low pressure protection according to claim 1 is characterized in that: be connected with refrigerant high pressure gauge (10) on the pipeline between the refrigerant inlet of described refrigerant evaporator (2) and the refrigerant exit of condenser.

4. the freezing type drier with high-low pressure protection according to claim 1 is characterized in that: be connected with hot gas bypass valve (11) between the refrigerant inlet of the refrigerant exit of described cold medium compressor (1) and refrigerant evaporator (2).

5. the freezing type drier with high-low pressure protection according to claim 1 is characterized in that: be connected with drier (12) on the pipeline between the refrigerant inlet of described refrigerant evaporator (2) and the refrigerant exit of condenser.

6. according to any described freezing type drier of claim 1-5 with high-low pressure protection; it is characterized in that: it also includes the air heat exchange machine (7) of band damp-heat air inlet (71), damp-heat air outlet (72), cold dry air inlet (73), cold dry air outlet (74); the damp-heat air outlet (72) of air heat exchange machine (7) is communicated with the air intake of refrigerant evaporator (2), is connected with moisture trap (8) between the cold dry air inlet (73) of the air outlet slit of refrigerant evaporator (2) and air heat exchange machine (7).

7. the freezing type drier with high-low pressure protection according to claim 6 is characterized in that: the damp-heat air inlet (71) of described air heat exchange machine (7) is connected with precooler (5).

8. the freezing type drier of controlled refrigeration matchmaker's temperature according to claim 6 is characterized in that: the bottom of described moisture trap (8) is provided with automatic water trap (13).