KR100770375B1 - Chiller - Google Patents

Abstract

The present invention relates to a chiller (chiller) that can circulate and cool the cooling water around the radiating parts of medical equipment such as MRI, CT, and measurement equipment such as XRD, XRF, etc., comprising a compressor, an outdoor unit, a heat exchanger, and a control unit. A chiller for supplying cooling water to a device requiring cooling, wherein the cooling water tank is provided between the heat exchanger and the equipment requiring cooling, and the cooling water tank is provided with a temperature sensor, and the heat exchanger side cooling water circulation path circulates between the heat exchanger and the cooling water tank. And a separate equipment coolant circulation path for circulating between the coolant tank and the equipment requiring cooling, wherein the controller receives the coolant temperature from the temperature sensor so that the temperature of the coolant tank is always maintained within a predetermined range. It is characterized by controlling the outdoor unit, according to the present invention, a large capacity compressor or heat In addition to providing coolant in a certain temperature range without ventilation, it is possible to supply coolant immediately for equipment requiring cooling, and even in the case of very fluctuating fluctuations in the cooling time, duration of cooling, and the number of times of cooling. There is an advantage that the cooling water can be stably supplied without a large load change or damage of the compressor.

Chiller, heat exchanger, evaporator

Description

Chiller {CHILLER}

1 is a block diagram of a chiller according to the present invention.

          Explanation of symbols on the main parts of the drawings

1, 5 compressor 3, 7 compressor compressor pipe

9: heat dissipation capacitor input tube 11: check valve

13: heat dissipation capacitor 15: cooling fan

21: blower 23: heat dissipation capacitor output tube

27: receiver 31, 35: receiver output tube

33: filter drier 37, 45: evaporator input tube

39: solenoid valve for cooling 41, 59: bypass valve for thawing

43, 57: expansion valve 47: evaporator

49: evaporator output pipe 51, 67: evaporation pressure control valve

53, 61: heat exchanger input tube 55: solenoid valve for cooling water

63: heat exchanger 65: heat exchanger output tube

69: compressor input tube 81: coolant tank

85: control unit 87, 89: temperature sensor

91, 97: inlet pipe 93, 95: heat exchanger side circulation pump

99: water outlet pipe 101, 111, 117, 124: water supply pipe

121, 125, 127: recovery pipe 103, 105, 113, 115: water supply valve

107, 109: equipment side circulation pump 119, 123: medical equipment

H: Housing

The present invention relates to a chiller (chiller), and more particularly to a chiller (chiller) that can be cooled by circulating the cooling water around the heat dissipation parts of medical equipment such as MRI, CT or measuring equipment such as XRD, XRF, etc. .

Representative chiller structures that have been conventionally used are described in FIGS. 1, 2, and “Previous Art in the Field” of the invention of Korean Utility Model Publication No. 20-313027.

1 and 2 of the invention designation No. 20-313027, the conventional chiller is a conventional chiller body 98 to the compressor (1), the condenser (2), the fan motor (3) and the heat exchanger (51) It is done by placing it inside. The high temperature and high pressure refrigerant gas compressed by the compressor (1) is sent to the condenser (2) through the refrigerant pipe (31), and the condenser (2) is introduced into the air drawn by the fan motor (3) installed at one end of the condenser (2). When the refrigerant passing through the inside is cooled to become a liquid refrigerant of low temperature and high pressure and is sent to the refrigerant pipe 33 inside the heat exchanger 51 through the refrigerant pipe 32, the refrigerant is expanded and cooled in the refrigerant pipe 33 while The cooling water 66 inside 51 is cooled, the refrigerant pipe 34 is added again, and is sent to the compressor 1, and a refrigerant | coolant continues to circulate. In addition, the coolant 66 cooled in the heat exchanger 51 is sent to the pump 61 through a water supply pipe 62 connected to the heat exchanger 51, and again, the specific equipment 88 required for cooling by MRI, etc. by the pump. The cooling water heated in the specific equipment 88 is sent directly to the heat exchanger 51 through the water supply pipe 63 to continue to circulate.

The conventional chiller described above has the following problems and needs to be improved.

First, the conventional chiller is configured to restart the stationary compressor 1 whenever cooling of the specific equipment 88 is required to make the coolant in the heat exchanger 51 and supply it directly to the specific equipment in the heat exchanger 51. have. According to this configuration, since it takes a considerable time to operate the compressor (1) and to make the coolant in the heat exchanger (51) there is a problem that can not effectively cope with this if the rapid cooling is required in a particular equipment. It may be considered to have a compressor 1 and a heat exchanger 51 having a very large capacity for quenching, but there is a limit in increasing the capacity of the compressor 1 and the heat exchanger 51.

Next, the fluctuation of the heat dissipation timing, heat dissipation period, heat dissipation frequency, etc. of the specific equipment 88 that needs to be cooled is very severe, and load fluctuation of the compressor 1 to cool it occurs very rapidly. This causes a lot of damage to the compressor (1) to shorten the life of the compressor, there is a problem that causes estrus to the compressor (1) even during normal use of the chiller.

Next, the conventional chiller installed a separate air conditioner for cooling the chiller and the room in which the specific equipment is installed. However, when the installation place of the chiller or the specific equipment is cramped, it is very inconvenient to install the air conditioner together with the chiller.

The present invention devised to solve the above-mentioned problems of the prior art is to provide a chiller capable of supplying cooling water to equipment requiring immediate cooling by always preparing a cooling water in a constant temperature range without having a large capacity compressor or heat exchanger. There is this.

Another object of the present invention is to provide a chiller that can stably supply cooling water even when the fluctuation of the cooling time, cooling period, number of times of cooling, etc. of equipment requiring cooling is very severe.

Still another object of the present invention is to provide a chiller that can serve as cooling of a room in which a chiller or the like is installed together with the supply of cooling water.

The present invention to achieve the above object

In the chiller having a compressor, an outdoor unit, a heat exchanger and a control unit for supplying cooling water to a device requiring cooling,

A coolant tank is provided between the heat exchanger and the equipment requiring cooling, and the coolant tank is provided with a temperature sensor to circulate between the heat exchanger side coolant circulation path and the coolant tank and the equipment requiring cooling. The equipment side coolant circulation path is separately formed, and the control unit receives the coolant temperature from the temperature sensor, and controls the compressor and the outdoor unit so that the temperature of the coolant tank is always kept within a predetermined range.

The evaporator may be further provided in parallel with the heat exchanger, and the housing of the chiller may further include an air vent and a blower configured to form an air flow passing through the evaporator to serve as cooling of indoor air.

The refrigerant input pipe of the heat exchanger or the evaporator, in parallel with the expansion valve, further comprises a defrost bypass valve that opens when the coil inside the heat exchanger or evaporator is frozen below a certain pressure, the room temperature and high pressure formed in the outdoor unit It is preferable that the refrigerant of is injected into the coil inside the heat exchanger or the evaporator while maintaining a high pressure.

Hereinafter, exemplary embodiments of a chiller according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a chiller according to the present invention.

The dashed-dotted line in FIG. 1 represents the housing H of the chiller. In FIG. 1, compressors 1 and 5 and outdoor units 13 and 15 are provided outside the housing H, and a receiver 27, a filter drier 33, a heat exchanger 63, and a heat exchanger side circulation pump 93 are provided. 95, the case where the evaporator 47 and the blower 21 are provided inside the housing (H) by way of example, according to the embodiment the compressor (1, 5) in the housing (H) In addition to the compressor (1, 5) and the outdoor unit (13, 15), the receiver 27 and the heat exchanger side circulation pump (93, 95) may also be installed outside the housing (H).

In addition, although the two compressors 1 and 5 are installed in parallel in FIG. 1, one compressor having a large capacity may be used or three compressors having a smaller capacity may be connected in parallel.

In addition, although one refrigerant circulation cycle including one heat exchanger is connected to the cooling water tank 81 in FIG. 1, two refrigerant circulation cycles including two heat exchangers may be connected according to an embodiment. The above number of refrigerant circulation cycles may be connected. That is, the refrigerant circulation cycle connected to the cooling water tank 81 can be further expanded in proportion to the cooling capacity required by the device (MRI, CT, etc.) requiring cooling.

In addition, there is no limitation in the number of devices requiring cooling, such as medical equipment connected to the cooling water tank 81 in FIG. That is, the water supply pipes 101, 111, 117, 124, water supply valves 103, 105, 113, 115, recovery pipes 121, 125, 127, and equipment side circulation pumps 107, 109 are additionally expanded as necessary. Or further reduced so that one or more equipment can be connected to the coolant tank.

Referring to FIG. 1, the chiller according to the present invention includes a compressor (1, 5) and a compressor (1, 5) for compressing a refrigerant gas into a high temperature and high pressure gas in order to make cooling water in the heat exchanger (63). After receiving the high-temperature and high-pressure gas to cool the cooling fan 15, the heat-dissipating capacitor (13) for outputting the liquid refrigerant of room temperature and high pressure, and the room temperature and high-pressure liquid refrigerant made by the heat-dissipating capacitor (13) to store the heat exchanger ), And a control unit 85 for controlling the compressor and the like. The heat dissipation capacitor 13 and the cooling fan 15 are combined to form an outdoor unit.

The present invention is characterized in that the coolant tank 81 is provided between the heat exchanger 63 and the equipment 119 and 123 requiring cooling, and the coolant tank 81 is provided with a temperature sensor 89. A heat exchanger-side cooling water circulation path circulating between the 63 and the cooling water tank 81 and an equipment-side cooling water circulation path circulating between the cooling water tank 81 and the equipment 119 and 123 requiring cooling, and the controller The compressor 85 receives the coolant temperature from the temperature sensor 89 installed in the coolant tank 81 so that the temperature of the coolant tank 85 is always kept within a predetermined range. 15) to control. In this configuration, irrespective of whether the equipment 119, 123, which requires cooling, such as medical equipment, is operated, the coolant tank 81 is always provided with a coolant having a predetermined temperature range. It can be put in immediately. In addition, the compressors 1 and 5 are operated only when the temperature of the coolant tank 81 exceeds a predetermined range, regardless of the driving of the medical equipment 119 and 123, so that there is no large load variation. There is no damage.

Another feature of the present invention is further provided with an evaporator 47 in parallel with the heat exchanger (63), the housing (H) of the chiller to form an air flow passing through the evaporator (47) vents (77) ) And a blower 21 are further provided to cool the indoor air in which the chiller is installed as well as the generation of the cooling water. To this end, the refrigerant is supplied to the compressor (1, 5)-> compressor output tube (3, 7)-> heat dissipation capacitor input tube (9)-> check valve (11)-> heat dissipation capacitor (13)-> heat dissipation capacitor output tube (23). )-> Receiver (27)-> Receiver output tube (31)-> Filter drier (33)-> Receiver output tube (35) and then to heat exchanger input tube (53) and evaporator input tube (37) Heat exchanger input tube (53)-> expansion valve (57)-> heat exchanger input tube (61)-> heat exchanger (63)-> heat exchanger output tube (65)-> compressor input tube (69) Evaporator input tube (37)-> Expansion valve (43)-> Evaporator input tube (45)-> Evaporator (47)-> Evaporator output tube (49)-> Compressor input It circulates through the path of pipe 69-> compressors 1 and 5. In order to control the circulation of the refrigerant to the heat exchanger 63 side for cooling water generation and the circulation of the refrigerant to the evaporator 47 side for cooling simultaneously or selectively, the temperature is sensed and the value is transmitted to the controller. A room temperature sensor 90 capable of transmitting is further provided outside the housing H, and the heat exchanger input tube 53 and the evaporator input tube 37 are respectively a solenoid valve 55 for cooling water and a solenoid valve for cooling ( And further comprising 56 to control the opening and closing of the coolant solenoid valve 55 or the cooling solenoid valve 56 according to an input value of the coolant temperature sensor 89 or the room temperature sensor 90. It is preferable.

Another feature of the present invention is in parallel with the expansion valves (57, 43) installed in the heat exchanger input tube (53) or the evaporator input tube 37, the coil inside the heat exchanger (63) or the evaporator (47) freezes. And a thawing bypass valve (59, 41) that opens when the temperature falls below a predetermined pressure, the refrigerant having a normal temperature and high pressure formed in the heat dissipation capacitor (13) of the outdoor unit is connected to the receiver (27) and the filter dryer (33). It is to be directly put into the coil inside the heat exchanger 63 or the evaporator 47 while maintaining a high pressure after the passage. By this method, it is possible to prevent the refrigerant circulation coil of the heat exchanger 63 or the evaporator 47 from freezing to interfere with or freeze the refrigerant circulation. If necessary, a bypass pipe (not shown) is provided directly connected to the input end of the heat exchanger 63 coil or the evaporator 47 coil directly from the compressor output pipes 3 and 7. The bypass valves 59 and 41 may be provided. In this case, the high temperature and high pressure gas of the compressors 1 and 5 is directly injected into the coil of the heat exchanger 63 or the coil of the evaporator 47 to thaw the coil frozen in a short time.

Referring back to FIG. 1, the heat exchanger output pipe 65 or the evaporator output pipe 49 further includes evaporation pressure control valves 51 and 67, and when the heat exchanger side or the evaporator side evaporation pressure drops below a set pressure, the refrigerant circulates. It is desirable to increase the refrigerant circulation when the evaporation pressure is higher than the set pressure. This prevents the evaporation temperature from becoming too low, thereby preventing the heat exchanger coil or evaporator coil from freezing.

According to the present invention, the cooling water of a certain temperature range is always prepared without any large-capacity compressor or heat exchanger, so that the cooling water can be immediately supplied to the equipment requiring cooling. , Even if the fluctuation of the cooling frequency is very severe, there is an advantage that the cooling water can be stably supplied without a large load change or damage of the compressor. In addition, since cooling of the room is possible with the supply of cooling water, there is an advantage in that the chiller and the medical equipment can be installed in a narrow space.

Although the chiller according to the present invention has been described with reference to the embodiments shown in the drawings, the scope of protection of the present invention is not intended to be limited thereto, and the protection scope of the present invention should be determined only by the matters set forth in the claims. will be.

Claims (3)

A chiller having a compressor, an outdoor unit, a heat exchanger, and a control unit for supplying cooling water to a device requiring cooling, the chiller may further include an evaporator in parallel with the heat exchanger, and a housing of the chiller may form an air flow passing through the evaporator. Air vents and blowers to provide cooling of the room air, A coolant tank is provided between the heat exchanger and the equipment requiring cooling, and the coolant tank is provided with a temperature sensor to circulate between the heat exchanger side coolant circulation path and the coolant tank and the equipment requiring cooling. A chiller circulating path is formed separately, and the controller controls the compressor and the outdoor unit to receive the coolant temperature from the temperature sensor so that the temperature of the coolant tank is always kept within a predetermined range. delete The method of claim 1, The refrigerant input pipe of the heat exchanger or the evaporator, in parallel with the expansion valve, further comprises a defrost bypass valve that opens when the coil inside the heat exchanger or evaporator is frozen below a certain pressure, the room temperature and high pressure formed in the outdoor unit The cooler of the chiller characterized in that it is put in the coil inside the heat exchanger or evaporator while maintaining a high pressure.

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