JPH058356U - Filter device in refrigeration system - Google Patents

Abstract

(57) [Summary] [Purpose] To save the trouble of cleaning the filter installed in the condenser, and prevent the compressor from being damaged or the cooling failure caused by clogging of the filter. In a refrigeration system in which a compressor 4, a condenser 2, an expansion valve 5 as a pressure reducing device, and a cooler 6 are sequentially connected to form a refrigeration cycle, a condenser 4 is provided with a roll-type filter 1, and Discharge pipe 4 connecting the compressor 4 and the condenser 2
In a, a thermostat 9 which is a temperature sensor or a pressure switch for detecting the refrigerant pressure in the discharge pipe is provided, and when the discharge temperature or the refrigerant pressure detected by the thermostat 9 or the pressure switch which is the temperature sensor is a set value or more, the roll A drive mechanism 3 for moving the filter 1 of the formula by the width of the condenser 2 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a filter device for a refrigerating device provided in a refrigerating showcase or the like. Regarding the table

[0002]

[Prior art]

  As is well known, such a refrigerated showcase has a duct inside the showcase body. It is divided into a cold air circulation path and a product storage with a plate, and the cold air cooled by the freezing device collects the products. The goods in the storage are being cooled. By the way, this refrigeration system uses a compressor, condenser, A compressor that connects a pressure device and a cooler sequentially with a refrigerant pipe to form a refrigeration cycle. The refrigerant gas compressed to high temperature and high pressure is sent to the condenser by the fan installed in the condenser. It is cooled by the air blown from it and exchanges heat to form a medium-temperature high-pressure liquid refrigerant. Is reduced to form a low-temperature low-pressure liquid refrigerant, which is evaporated in a cooler to obtain cooling air.

[0003]

[Problems to be solved by the device]

  When the refrigerant gas from the compressor is heat-exchanged in the condenser, it is installed in the condenser as described above. The fan is designed to take in the outside air into the condenser, but there is no dust contained in the outside air. To prevent throat from being sucked into the condenser with air, fill the condenser suction side. Is provided. However, if the filter becomes clogged, it will be blocked by the fan. The amount of heat exchange air sent to the compressor is reduced, which results in an increase in condenser temperature. The heat exchange amount of the condenser decreases, which may result in poor cooling or damage to the compressor. And to eliminate such inconvenience, it is necessary to clean the filter frequently. , Takes time.

[0004]   The purpose of the present invention is to eliminate the disadvantages of the conventional example and to prevent clogging of the condenser filter. A new filter is automatically installed when it occurs, saving you the trouble of cleaning. , A filter device in a refrigerant device that can prevent damage to the compressor, poor cooling, etc. Is to provide storage.

[0005]

[Means for Solving the Problems]

  In order to achieve the above object, the present invention sequentially includes a compressor, a condenser, a decompression device, and a cooler. In a refrigeration system that connects to form a refrigeration cycle, a roll-type filter is attached to the condenser. And a discharge pipe connecting the compressor and condenser to the temperature sensor or A pressure switch that detects the pressure of the refrigerant in the discharge pipe is provided, and a temperature sensor or pressure switch is installed. If the discharge temperature or refrigerant pressure detected by the switch exceeds the set value, the roll type filter The main point is to provide a drive mechanism that moves the luter by the width of the condenser. It

[0006]

[Action]

  According to the present invention of claim 1, the filter of the condenser is clogged and the condenser is Temperature rises, which causes the temperature of the discharge pipe connecting the compressor and the condenser to rise. , The discharge pipe temperature detected by the temperature sensor installed here is above the set value when it is normal Then, the roll type filter installed in the condenser is driven by the drive mechanism by the width of the condenser. Another part of the rolled-up filter is located on the suction side of the condenser and The part where the peeling occurs is wound up and removed from the suction side. Therefore, clean the filter Without doing so, an unclogging filter can be placed on the suction side of the condenser.

[0007]   According to the invention of claim 2, a pressure switch provided in place of the temperature sensor is provided. The refrigerant pressure in the discharge pipe is detected, and when the refrigerant pressure exceeds a set value, the The roll type filter moves as in the case of Removed from the suction side of the condenser, the unclogging filter part is placed on the suction side To be done.

[0008]

【Example】

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 shows the refrigeration equipment of the present invention FIG. 2 is a refrigerant circuit diagram showing a first embodiment of a filter device in a storage unit, and FIG. Fig. 3 is a perspective view of the filter used in the filter device of the device FIG. 1 is a perspective view of a condenser in the apparatus, and first, the overall configuration of the refrigeration apparatus will be described with reference to FIG. 1. Then, the refrigerating apparatus includes a compressor 4, a condenser 2 and an expansion valve, which is a pressure reducing device, as is conventionally known. Refrigerating cycle is formed by connecting 5, cooler 6 and accumulator 7 in sequence with refrigerant piping. To do.

[0009]   The condenser 2 of such a refrigeration system is provided with a fan 8 for blowing air for heat exchange. And a filter to remove dust contained in the air to be taken in. 1 is arranged on the suction side. This filter 1, as shown in FIG. A long object is used, one side of this length direction is wound around the roll 1b, and the other side is wound from here. As shown in FIG. 3, the roll type is used in which the side is sequentially wound around another roll 1c. Is between the left and right rolls 1b and 1c, and is not taken up by any of the rolls 1b and 1c. The length of the flat portion 1a is formed to be substantially equal to the width L of the condenser 2, and the flat portion 1a is It was made to face the suction surface of the compactor 2. Then, the roll 1c on the winding side of the filter 1 It connects with the drive shaft of the drive mechanism 3 via a belt. This drive mechanism 3 is a motor 3a Is the main subject.

[0010]   Discharge to the compressor 4 side of the discharge pipe 4a which is a refrigerant pipe connected to the discharge side of the compressor 4. The temperature of the pipe 4a, that is, the temperature of the refrigerant gas discharged from the compressor 4 to the condenser 2 is detected. A thermostat 9 is provided as a known temperature sensor.

[0011]   FIG. 4 shows a control circuit diagram of the motor 3a as the drive mechanism 3, which shows the temperature of the discharge pipe 4a. Control relay 1 is closed at the contact 9a of the thermostat 9 1 are connected in series, and the timer relay 10 is connected to the control relay 11 in parallel. The motor relay 3a and the relay 1 are connected to the contact 10a of the timer relay 10 connected to the column. 2 are connected in series and each contact 11a of the control relay 11 and the relay 12 is connected. , 12a are connected to the timer relay 10 in series. And these motors 3 a series connection circuit, control relay 11 series connection circuit, timer relay 10 series The connection circuit is connected in parallel to the power supply 13. The operation of the timer relay 10 The time is set to the time until the flat portion 1a of the filter 1 is completely wound on the roll 1c. Set.

[0012]   Next, the operation will be described. During the cooling operation, the condenser 2 is pumped from the compressor 4. The high temperature and high pressure refrigerant gas is exchanged with the outside air taken in by the fan 8. filter -If the flat surface 1a of -1 is clogged and the amount of air taken in by the fan 8 decreases The heat exchange amount decreases, and the temperature of the discharge pipe 4a on the inlet side of the condenser 2 rises.

[0013]   The temperature of the discharge pipe 4a is detected by the thermostat 9, and when the temperature exceeds the set value, the contact is made. The point 9a is closed, the control relay 11 and the timer relay 10 are energized, and The contacts 11a, 10a of are closed. When the contact 10a is closed, the motor 3a and the relay 1 2 is energized, the motor 3a is driven, and the roll 1c on which the filter 1 is wound up Rotates. As a result, the flat portion 1a of the filter 1 is wound around the roll 1c, The unused filter 1 is fed from the roll 1b, and at the same time, the timer relay 10 Starts counting movement time of the length L of the filter 1. During this time the relay Since the contact 12a is closed by energizing 12, the timer is reset even if the contact 9a returns. The power supply to the relay 10 is not interrupted.

[0014]   Then, the portion of the flat portion 1a in which clogging has occurred, that is, the filter 1 for the length L Is completely wound up on the roll 1c, and the filter 1 of the new part without clogging is the condenser When moving to the air suction side of 2, the timer relay 10 counts up and the contact 1 0a opens, the power to the motor 3a is cut off, the motor 3a stops, and the roll 1 The rotation of c is also stopped, and the new part of the filter 1 without clogging becomes the air of the condenser 2. It is arranged on the intake side. When the filter 1 is clogged as described above, The filter 1 rolls automatically and a new part without clogging is placed in the condenser 2. It

[0015]   In the first embodiment, the clogging of the filter 1 is detected based on the temperature of the discharge pipe 4a. As has been known, the detection means is not set to this, and in the second embodiment, as shown in FIG. 6, the refrigerant pressure of the refrigerant gas in the discharge pipe 4a instead of the thermostat 9 Is provided with a high-pressure pressure switch 14, and a contact point 14a of the high-pressure pressure switch 14 is provided. In series with the relay 11 instead of the contact 9a of the thermostat 9 in the first embodiment. Connected. The other structure is the same as that of the first embodiment, but in FIG. Capillary tube 15 was used.

[0016]   In the case of the second embodiment, the filter 1 is clogged and the discharge pipe 4a When the pressure of the refrigerant gas inside reaches the set value or more, the contact 14a is closed and the motor 3a is closed. The roll 1c that winds up the filter 1 is rotated by the electric current flowing in the Roll 1c is wound up on the roll 1c, and a new filter 1 is pulled out from the roll 1b. It

[0017]

[Effect of device]

  As described above, the filter device in the refrigeration system of the present invention is When clogging occurs, the part with the clogging is automatically wound up and a new part is fed out. Eliminates the need for filter cleaning, and heat exchange of the condenser due to filter clogging Since it is possible to prevent a decrease in the amount, it is possible to prevent poor cooling and damage to the compressor.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit diagram showing a first embodiment of a filter device in a refrigeration system of the present invention.

FIG. 2 is a perspective view of a filter showing a first embodiment of the filter device in the refrigerating apparatus of the present invention.

FIG. 3 is a perspective view of a condenser showing a first embodiment of the filter device in the refrigeration system of the present invention.

FIG. 4 is a control circuit diagram showing a first embodiment of the filter device in the refrigerating apparatus of the present invention.

FIG. 5 is a refrigerant circuit diagram showing a second embodiment of the filter device in the refrigeration system of the present invention.

FIG. 6 is a control circuit diagram showing a second embodiment of the filter device in the refrigerating apparatus of the present invention.

[Explanation of symbols]

1 ... Filter 1a ... plane part 1b, 1c ... Roll 2 ... condenser 3 ... Drive mechanism 3a ... Motor 4 ... Compressor 4a ... Discharge pipe 5 ... Expansion valve 6 ... Cooler 7 ... Accumulator 8 ... fan 9 ... Accumulator 9a ... Contact 10 ... Timer relay 10a ... contact point 11 ... Control relay 11a ... contact point 12 ... Control relay 12a ... contact 13 ... Power supply 14 ... High pressure switch 14a ... contact point 15 ... Capillary

Claims (2)

[Scope of utility model registration request] 1. A refrigeration system in which a compressor, a condenser, a decompression device, and a cooler are sequentially connected to form a refrigeration cycle,
A roll type filter is provided in the condenser, and a temperature sensor is provided on the compressor side of the discharge pipe that connects the compressor and the condenser, and the roll is used when the discharge temperature detected by the temperature sensor is a set value or more. A filter device in a refrigerating apparatus, which is provided with a drive mechanism for moving the filter by the width of the condenser. 2. A refrigeration system in which a compressor, a condenser, a decompression device, and a cooler are sequentially connected to form a refrigeration cycle,
The condenser is provided with a roll-type filter, the discharge pipe connecting the compressor and the condenser is provided with a pressure switch for detecting the refrigerant pressure in the discharge pipe, and the refrigerant pressure detected by the pressure switch is equal to or higher than a set value. In the above case, the filter device in the refrigerating apparatus is provided with a drive mechanism for moving the roll type filter by the width of the condenser.