KR20000013778A - Withdrawing device for suction type freezer - Google Patents

Abstract

PURPOSE: A withdrawing device for a suction type freezer is provided to be able to discharge uncondensed gas constantly to improve the freezing efficiency by the pressure difference between the bleeding tank and the vacuum chamber even if the pressure of the cooling water passing through the ejector of a suction type freezer changes or is too low. CONSTITUTION: The bleeding device of a suction type freezer comprises; a bleeding tank(50) to collect uncondensed gas discharged from the shell(6) of a freezer; an electronic valve(58) to be opened and closed by an electric signal to discharge the uncondensed gas in the bleeding tank(50) out of the bleeding pipe(52); a water ejector(60) to discharge the uncondensed gas flew in as the electronic valve(58) is opened to the outside by the cooling water; a vacuum chamber(80) into which the uncondensed gas is introduced from the bleeding tank(50) as the electronic valve(58) is opened; a pressure difference switch(90) to open and close the electronic valve(58) by the pressure difference between the bleeding tank(50) and the vacuum tank(80).

Description

Extractor of absorption chiller

The present invention relates to a scavenging device of an absorption chiller, and more particularly, by installing a vacuum chamber between the bleeding tank and the water ejector for collecting the non-condensable gas discharged from the cell of the freezer, these bleeding by a differential pressure switch It relates to a scavenging device of the absorption chiller for opening the solenoid valve according to the pressure difference between the tank and the water ejector to discharge the non-condensable gas in the bleeding tank to the water ejector through the vacuum chamber.

In general, air conditioners are designed to maintain optimum temperature and humidity according to all climatic conditions and indoor environments. This includes an air conditioner to keep the indoor air cool in a hot summer, and to keep the indoor air warm in a cold winter. There is a heating device to

Among them, a cooling device includes an air conditioner and a refrigerator using water as a refrigerant. The air conditioner uses cold water to make cold air and then supplies it to the room. Some air conditioners include indoor and outdoor units, but in most cases, separate air conditioners are used.

As such, the air conditioner supplies cold air to the room by cooling the liquid refrigerant evaporated into the refrigerant in the gaseous state, while the refrigerator uses water introduced through the heat exchange generated during evaporation of the liquid refrigerant. Cooling makes cold water, which is distinguished from air conditioning in that it cools the air by cooling cold water, cools it, and then supplies it to the room.

The refrigerator can be classified into various types according to the refrigerant, and in particular, the water is used as the refrigerant. In the absorption type refrigerator using water as a refrigerant, lithium bromide is mainly used as an absorbent, and water and lithium bromide solution are heated using steam or high temperature water. Referring to FIG. Brief description of the absorption chiller.

1 is a block diagram showing a general absorption chiller, Figure 2 is an enlarged view showing an absorption tube of the absorption chiller according to the prior art. First, as shown in FIG. 1, in the general configuration of the absorption type refrigerator, the high temperature regenerator 2 for heating the rare solution introduced from the high temperature heat exchanger 10 and the high temperature regenerator through the pipe 32 are shown. The low temperature regenerator 8 includes a condenser 20 in which the rare solution introduced from (2) is evaporated and condensed into water vapor, and an evaporator 22 in which the condensed water introduced from the condenser 20 is evaporated through the pipe 34. And an absorber 24 for absorbing water evaporated by the absorbent. The evaporator 22 and the absorber 24 are arranged inside the cell 2.

The coolant introduced along arrow P passes through absorber 24 and condenser 20 in sequence along pipe 18 and is then discharged along arrow P '. The cold water introduced along arrow Q is The pipe 30 is introduced into the evaporator 22 and cooled, and then supplied to the cooling coil along the arrow Q 'to cool the indoor space.

The absorption chiller is provided with three pumps 12, 14 and 16. Among these, the absorption pump 12 serves to extract the diluted solution and send it back to the absorber 24. The refrigerant pump 14 sends the water not evaporated from the evaporator 22 back to the atomizer on the evaporator 22. The regeneration pump 16 serves to send the concentrated absorption solution introduced through the suction pipe 40 to the high temperature regenerator 2 through the low temperature heat exchanger 8 and the high temperature heat exchanger 10.

The absorption chiller is provided with a bleeding device for discharging the non-condensable gas collected in the low pressure portion of the refrigerator cell (6). In view of this configuration, the extraction tank 50 for collecting the non-condensable gas discharged from the cell 6, the pressure sensor 54 for detecting the pressure in the extraction tank 50, and the pressure sensor 54 The solenoid valve 58 which opens and closes according to the signal transmitted from the controller 74 and flows the non-condensable gas through the bleed pipe 52 and the non-condensate which flows in accordance with the opening of the solenoid valve 58 based on the received pressure. It consists of a water ejector 60 for discharging the gas to the outside by the cooling water introduced through the inlet pipe. A check valve 56 is provided between the bleeding tank 50 and the solenoid valve 58 to prevent backflow of non-condensable gas.

The water ejector 60 discharges the non-condensable gas to the outside by the cooling water introduced through the inlet pipe, and the introduced cooling water is discharged to the upper cooling water pipe 18 through the discharge pipe.

2 is a cross-sectional view of the water ejector 60, one end is formed with an inlet port 62 through which the coolant is introduced through the inlet pipe 72, the other end discharge port 64 is discharged to the discharge pipe 70 ) Is formed. In addition, in the center is provided with a bleeding inlet 66 through which the non-condensable gas flows through the bleed pipe 52, the non-condensed gas introduced through the bleeding inlet 66 in accordance with the opening of the solenoid valve is exhaust portion 68 Through the air to the atmosphere.

In the scavenging device of a conventional absorption chiller having such a configuration, the quantity or pressure of the cooling water passing through the water ejector is maintained at a high capacity in the case of a large capacity, but in the case of a small capacity absorption chiller, since the pressure of the cooling water is low or not constant, the water As the performance of the ejector is deteriorated, the discharge operation of the non-condensable gas is not smoothly performed, and thus the refrigeration efficiency is lowered.

In order to solve the above problems, the present invention provides a vacuum chamber between the extraction tank and the water ejector, so that the pressure between the extraction tank and the vacuum chamber even when the pressure of the cooling water passing through the water ejector of the small absorption chiller is variable or low. It is an object of the present invention to provide a scavenging device of an absorption type refrigerator that can discharge non-condensable gas constantly according to a car.

1 is a block diagram showing a scavenging device of a conventional absorption chiller,

2 is a cross-sectional view showing the water ejector of FIG.

Figure 3 is a block diagram showing a bleeding device of the absorption chiller according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

2: high temperature regenerator 4: low temperature regenerator

6: Cell 8: Low Temperature Heat Exchanger

10: high temperature heat exchanger 16: regeneration pump

20: Condenser 22: Evaporator

24: Absorber 50: Extraction tank

52: extraction pipe 56: check valve

58: solenoid valve 60: water ejector

70: discharge pipe 72: inlet pipe

80: vacuum chamber 90: differential pressure switch

An object of the present invention described above is the extraction tank for collecting the non-condensable gas discharged from the freezer cell, the solenoid valve for opening and closing in accordance with the electrical signal to discharge the non-condensable gas in the extraction tank to the extraction pipe, the opening of the solenoid valve In the scavenging device of the absorption chiller consisting of a water ejector for discharging the non-condensable gas introduced by the cooling water to the outside with a cooling water, the vacuum chamber, the bleeding tank and the vacuum inflow of the non-condensable gas from the bleeding tank as the solenoid valve is opened And a differential pressure switch for opening and closing the solenoid valve according to the pressure difference between the chambers.

Hereinafter, with reference to the accompanying Figure 3 will be described in detail with respect to the extraction device of the absorption chiller according to a preferred embodiment of the present invention, the same parts as the conventional structure described in Figure 1 are denoted by the same reference numerals.

Figure 3 is a block diagram showing the extraction device of the absorption chiller according to the present invention. As described in FIG. 1, the non-condensable gas generated in the low pressure portion of the refrigerator cell 6 is discharged through the pipe and is primarily collected in the bleeding tank 50. In the preferred embodiment of the present invention, a vacuum chamber 80 is installed between the extraction tank 50 and the water ejector 60 to discharge the non-condensable gas collected in the extraction tank 50. Regardless of the pressure of the cooling water passing through 60), a certain amount of non-condensable gas can be extracted.

In view of the overall configuration, the extraction tank (50) for collecting the non-condensable gas discharged from the freezer cell (6), and the opening and closing according to the electrical signal to extract the non-condensable gas in the extraction tank (50) the extraction pipe (52) Solenoid valve 58 for discharging air, the water ejector 60 for discharging non-condensable gas introduced by opening the solenoid valve 58 to the outside by cooling water, and the bleeding tank according to the opening of the solenoid valve 58 And a differential pressure switch 90 for opening and closing the solenoid valve 58 in accordance with the pressure difference between the bleeding tank 50 and the vacuum chamber 80. .

Here, the vacuum chamber 80 is connected to the bleed inlet 66 of the water ejector 60, the inside of which is always maintained in a vacuum state by a vacuum means (not shown). As such, since the water ejector 60 is connected to the vacuum chamber 80, when the coolant flows to the water ejector 60 through the inlet pipe 72, the bleed tank 50 through the bleed pipe 52. Non-condensing gas introduced from the water is sent to the water ejector 60 is discharged to the outside.

In addition, the pressure in the bleeding tank 50 and the vacuum chamber 80 is respectively sent to a dual differential switch 90, the differential pressure switch 90 is a solenoid valve 58 in accordance with the pressure sent from them Signal by). That is, the differential pressure switch 90 sends a signal to the solenoid valve 58 only when the pressure difference is greater than or equal to a predetermined value based on the pressure sent from the bleeding tank 50 and the vacuum chamber 80 to open it.

In operation, the differential pressure switch 90 sends an electrical signal to the solenoid valve 58 when the pressure difference between them is received from the bleeding tank 50 and the vacuum chamber 80, for example, 80 mmHg or more. Open it up. As the solenoid valve 58 is opened, the non-condensable gas in the bleeding tank 50 is supplied to the vacuum chamber 80 via the bleeding pipe 52, and the non-condensable gas introduced into the vacuum chamber 80 is water. It is sucked through the bleeding inlet 66 of the ejector 60 and discharged to the outside.

Next, when the pressure difference transmitted from the bleeding tank 50 and the vacuum chamber 80 becomes, for example, 20 mmHg or less, the differential pressure switch 90 no longer sends an electric signal to the solenoid valve 58, and the solenoid valve 58 blocks the flow path of the bleed pipe 52. Accordingly, the supply of the non-condensable gas sent from the bleeding tank 50 to the vacuum chamber 80 via the bleed pipe 52 is stopped. Even in this case, the non-condensable gas contained in the vacuum chamber 80 is continuously formed by the additional action of the water ejector 60.

According to the present invention described above, since the vacuum chamber is provided between the bleeding tank and the water ejector, when the pressure in the bleeding tank becomes higher than the prescribed value by the differential pressure switch, the non-condensable gas is discharged into the vacuum chamber, thereby providing a compact absorption type. Even when the pressure of the cooling water passing through the water ejector of the refrigerator is variable or low, there is an advantage of improving the refrigeration efficiency by constantly discharging the non-condensable gas according to the pressure difference between the extraction tank and the vacuum chamber.

Claims (1)

An extraction valve 50 for collecting the non-condensable gas discharged from the freezer cell 6 and an electromagnetic valve which is opened and closed in accordance with an electrical signal to discharge the non-condensable gas in the extraction tank 50 to the extraction pipe 52 ( 58), and the scavenging apparatus of the absorption chiller consisting of a water ejector (60) for discharging the non-condensable gas introduced in accordance with the opening of the solenoid valve 58 to the outside by the cooling water, A vacuum chamber 80 into which non-condensable gas flows from the bleeding tank 50 according to the opening of the solenoid valve 58; And a differential pressure switch (90) for opening and closing the solenoid valve (58) according to the pressure difference between the bleeding tank (50) and the vacuum chamber (80).