JPH08159582A - Air-cooled condenser of heat pump using new substitute refrigerant gas hfc - Google Patents

Abstract

PURPOSE: To pass the atmosphere through a plurality of air-cooled condensers by one supply fan by using HFC new substitute refrigerant gas, operation a heat pump and providing the plurality of the condensers to condense the gas. CONSTITUTION: A supply fan is installed between an additional air-cooled condenser 2B and a normal air-cooled condenser. The condenser 2B and the normal condenser 2B are installed, and the fan is installed out the outside of the condenser 2A or 2B. The condensers 2B and 2A are installed, and the fan is installed at the upper part.

Description

Detailed Description of the Invention

[0001]

The present invention uses a new alternative refrigerant gas HFC (hydro, fluoro, carbon) that does not affect the ozone layer, and uses heat pumps (coolers, refrigerators, vending machines for cooled materials, refrigeration shows). Case, freezer). It is also used to improve the efficiency of the heat pump by using the currently used HCFC refrigerant gas.

[0002]

2. Description of the Related Art CF currently used as a refrigerant gas
Even if the refrigerant gas is extracted from the heat pump operated by C12, HCFC22, mixing 502, etc. and the HFC refrigerant gas is supplied to operate the heat pump, it does not operate normally. The reason is that the HFC-based refrigerant gas does not contain chlorine, and thus has poor compatibility with oil, and oil is separated during operation and the compressor burns. Also, the operating pressure of the HFC134a is low, so that a required amount of gas does not pass through the narrow holes of the expansion valve and the capillar tube.

[0003]

DISCLOSURE OF THE INVENTION The present invention increases the heat exchange capacity of a condenser to improve the condensation of a refrigerant gas and to liquefy the refrigerant gas in a bubble-free state, thereby making the compatibility of the refrigerant gas and the oil. By operating the heat pump with the HFC-based refrigerant gas, and particularly by making the HFC134a free from bubbles, the flow rate of the gas in the expansion valve and the capillary tube is increased, and the heat pump is operated with high efficiency. Although the so-called invention has been filed by the present inventors, the present invention relates to installation of an extension capacitor. The conventional air-cooled condenser and the additional air-cooled condenser are operated with a single fan.

[0004]

The present invention will be described with reference to the drawings. FIG. 1, compressor 1, additional condenser 2
B, the normal air-cooled condenser 2A, the expansion valve 3, the evaporator 4 are connected by a gas pipe 5, or the air-cooled condenser 2
Install B and 2A in parallel, or if you cannot make them parallel,
Air cooling condensers 2B and 2 are used to improve the passage of air.
The air guide plate 7 is attached to the side surface of A or the side surface and the upper surface. A ventilation fan 6 is attached between the air-cooled condensers 2B and 2A to blow the atmosphere toward 2B so that the atmosphere is sucked by 2A and then passes through 2B. The high-pressure, high-temperature refrigerant gas discharged from the compressor 1 first enters the air-cooling condenser 2B and exchanges heat with the atmosphere sent through 2A, then is sent to 2A, and again exchanges heat with the atmosphere. While the heat pump is operating, the atmosphere whose temperature has risen by exchanging heat with the refrigerant gas at 2A enters 2B, but the temperature of the refrigerant gas immediately after being discharged from the compressor 1 is higher than the atmospheric temperature after leaving 2A. So heat exchange is sufficient.
When the gas temperature is high, it exchanges heat with the high temperature atmosphere, and when the gas temperature is low, it exchanges heat with the low temperature atmosphere. In this way, the capacity is increased with the air-cooled condensers 2B and 2A to exchange heat with the atmosphere, and the refrigerant gas is completely condensed in a bubble-free state.

FIG. 2 shows a compressor 1, an additional air-cooled condenser 2B, a normal air-cooled condenser 2A, an expansion valve 3 and an evaporator 4 which are connected by a gas pipe 5. The air-cooled condensers 2B and 2A are installed in parallel or are shown in FIG. As shown in FIG. 2, the atmosphere guide plate 7 is attached, and the blower fan 6 is attached to the outside of the normal air-cooling condenser 2A to blow the atmosphere toward 2A, and the atmosphere passes through 2A and then passes through 2B. The high-pressure, high-temperature refrigerant gas discharged from the compressor 1 first enters the air-cooled condenser 2B and 2
After exchanging heat with the atmosphere sent through A, it is sent to 2A and again exchanges heat with the atmosphere to completely condense the refrigerant gas.

In FIG. 3, the compressor 1, the additional air-cooling condenser 2B, the normal air-cooling condenser 2A, the expansion valve 3 and the evaporator 4 are connected by a gas pipe 5. Either the air-cooling condensers 2B, 2A should be installed in parallel. As shown in 3, the atmosphere guide plate 7 is attached, and the blower fan 6 is attached to the outside of the additional air-cooling condenser 2B to suck in the atmosphere,
The atmosphere passes 2A and then 2B.

FIG. 4 shows a compressor 1, an additional air-cooling condenser 2B, a normal air-cooling condenser 2A, an expansion valve 3 and an evaporator 4 which are connected by a gas pipe 5, but the air-cooling condensers 2B, 2A are spaced at the same size as the blower fan. Open and install in parallel, or install in an L-shape, attach the air guide plate 7 to the side, attach the blower fan 6 to the upper part, and blow or suck the atmosphere with the blower fan 6 to air cool the condenser 2B, One air blower is used to pass the air through both 2A. The high-pressure, high-temperature refrigerant gas discharged from the compressor 1 is first added to the additional air cooling condenser 2B.
And then exchanges heat with the atmosphere, and then is normally sent to the air-cooled condenser 2A to exchange heat with the atmosphere again.

When the refrigerant gas is discharged from the compressor 1 and exchanges heat with the atmosphere in the additional air cooling condenser 2B,
If the gas temperature of 2B output is lowered by 3 ° C or more than the gas temperature of air cooling condenser 2B, normal air cooling condenser 2A
The condensation of the gas exiting is sufficient. Further, when the temperature of the gas discharged from the 2B is lower than the temperature of the gas containing 2B by 5 ° C. or more, the refrigerant gas loses heat radiation calories at 2A, and the refrigerant gas is completely liquefied without bubbles. When modifying the heat pump currently used, even if the air cooling condenser 2B is added,
The same applies when used as B and an additional capacitor as 2A.

[0009]

1, the high-pressure, high-temperature refrigerant gas discharged from the compressor 1 is sent to the additional air-cooling condenser 2B and exchanges heat with the atmosphere sent from the blower fan 6, and then is sent to the normal air-cooling condenser 2A. And exchanges heat with the atmosphere sucked by the blower fan 6. Normally, the temperature of the atmosphere that has exchanged heat with the refrigerant gas in the air-cooled condenser 2A rises. In the operation of the heat pump up to now, the atmosphere which has become high temperature by exchanging heat with the refrigerant gas is immediately released. In this case, the air whose temperature has risen is sent to the additional air-cooling condenser 2B by the blower fan 6. However, since the temperature of the refrigerant gas discharged from the compressor 1 is higher than the temperature of the atmosphere sent to 2B, heat exchange is possible.
The heat exchange between the refrigerant gas of the heat pump and the atmosphere is not always
It is sufficient that the temperature of the atmosphere to be heat-exchanged further rises and the required calories are released even if heat exchange is not performed with the atmosphere having a low temperature. The refrigerant gas that has radiated heat in the additional air-cooling condenser 2B and has decreased in temperature is normally sent to the air-cooling condenser 2A and exchanges heat with the low temperature atmosphere. When the temperature of the refrigerant gas is high, heat is exchanged with the high temperature atmosphere, and when the temperature of the refrigerant gas is low, heat is exchanged with the low temperature atmosphere. After exchanging heat with the additional condenser 2B, heat is normally radiated with the air-cooled condenser 2A, so the heat radiation calorie of the refrigerant gas disappears and it liquefies without bubbles, so the refrigerant gas and oil are well fused and the HFC refrigerant gas is used. Then, the heat pump can be operated.
Since there are no bubbles, the amount of gas passing through the expansion valve and capillarity tube is large, and the operating pressure is low.
The heat pump can be operated with high efficiency by using the refrigerant gas of a.

In FIG. 2, an additional air-cooling condenser 2B and a normal air-cooling condenser 2A are installed, and a blower fan 6 is attached to the outside of 2A to blow air toward 2A, and the atmosphere passes 2A and then 2B. The position of the blower fan is different from that in FIG. 1, but the effect is the same. The high-pressure, high-temperature refrigerant gas discharged from the compressor 1 enters the additional air cooling condenser 2B, exchanges heat with the atmosphere sent through the normal air cooling condenser 2A, and then is sent to 2A to exchange heat with the atmosphere.
Also in this case, heat exchange is performed with the high temperature atmosphere in 2B where the gas temperature is high, and with the low temperature atmosphere in 2A where the gas temperature is low. After heat exchange with the atmosphere in the additional air-cooling condenser 2B, heat exchange with the atmosphere in the normal air-cooling condenser 2A also eliminates the heat release calorie of the refrigerant gas, and the refrigerant gas is completely liquefied without bubbles and is well fused with oil. It becomes possible to operate the heat pump using the HFC-based new alternative refrigerant gas.

In FIG. 3, an additional air-cooling condenser 2B and a normal air-cooling condenser 2A are installed, a ventilation fan is attached to the outside of 2B, and the atmosphere is sucked, so that the atmosphere passes through 2A and then 2B. 1, the position of the blower fan is different from that of FIG. 2, but the effect is the same. Even in this case, the high pressure and high temperature refrigerant gas discharged from the compressor 1 is
After entering the additional air-cooling condenser 2B and exchanging heat with the atmosphere normally sent through the air-cooling condenser 2A, it is sent to 2A and exchanges heat with the atmosphere. Additional air-cooled condenser 2B
After exchanging heat with the atmosphere, the heat is also exchanged with the normal air-cooled condenser 2A, so the heat dissipation calorie of the refrigerant gas disappears,
It completely liquefies into a bubble-free state and the fusion of the refrigerant gas and the oil is improved, and the heat pump can be operated using the HFC refrigerant gas.

In FIG. 4, an additional air-cooling condenser 2B and a normal air-cooling condenser 2A are installed, an air guide plate 7 is attached to the side surfaces of 2B and 2A, and the air sent by a blower fan 6 attached to the upper portion passes through both 2B and 2A. Let's do 2B, 2
It exchanges heat with the refrigerant gas passing through A. The high-pressure, high-temperature refrigerant gas discharged from the compressor 1 enters the additional air cooling condenser 2B and exchanges heat with the atmosphere sent by the blower fan 6, and then is sent to 2A and exchanges heat with the atmosphere sent by the blower fan 6 again. To do. In this case, 2
The atmospheres sent to B and 2A have the same temperature. Even if the blower fan 6 is sucked, the same effect is obtained. After heat exchange with the additional air-cooled condenser 2B, the normal air-cooled condenser 2
Even in A, the heat exchange with the atmosphere is eliminated, so that the heat dissipation calorie of the refrigerant gas disappears, and the refrigerant gas and oil are well fused and completely liquefied without bubbles, and the heat pump operation using the new alternative refrigerant gas of HFC system. Is possible.

The air-cooled condenser of this heat pump has two
B and 2A are added and the method of exchanging heat with one blower fan is applied to the indoor unit of the currently popular air conditioner, which is used as an evaporator during summer cooling and as a condenser during winter heating. To be done.

When the operation is performed by adding the air-cooled condensers 2B and 2A, the refrigerant gas is completely liquefied and the flow rate of the refrigerant gas in the expansion valve and the capillaries increases, so that the air-cooled heat exchanger of the evaporator is the same as the condenser. As it increases, the efficiency of the heat pump increases.

Two air-cooled condensers for this heat pump
The method of adding B and 2A and exchanging heat with one blower fan is not limited to the currently used HCFC22 and other HCs.
Efficiency is improved even when operating using FC type refrigerant gas.

[0016]

[Example] An example of a case in which beer, juice cans, etc. are refrigerated is put into practical use. As shown in FIG. 1, a normal air-cooled condenser 2A and an air blower fan 6 that sucks air so that the air passes through the 2A are attached with an additional air-cooled condenser 2B.
The refrigerant gas discharged from the compressor 1 is sent to the additional air cooling condenser 2B to exchange heat with the atmosphere, and then to the normal air cooling condenser 2A to exchange heat with the atmosphere again. Refrigerant gas is a new alternative refrigerant gas HFC134a
It was used. The temperature of each point during operation of the heat pump of the refrigerating case in use is shown.

1 ... Compressor discharge gas temperature 53.2 ° C 2 ... Additional air-cooled condenser 2B outlet gas temperature 32.6 ° C 3 ... Normal air-cooled condenser 2A outlet gas temperature 22.1 ° C 4 ... Evaporator Outlet gas temperature 4.1 ° C 5 ...... Gas temperature in compressor 7.1 ° C 6 ...... Compressor surface temperature 29.1 ° C 7 ...... Normal air-cooled condenser 2A entering atmospheric temperature 13.8 ° C 8 ...... Normal Air-cooled condenser 2A outlet air temperature 17.4 ° C 9 …… Atmospheric temperature with additional air-cooled condenser 2B 17.4 ° C 10 …… Additional air-cooled condenser 2B outlet atmospheric temperature 20.4 ° C 11 …… Refrigerating case temperature 0. 1 ° C 12 …… Atmospheric temperature 13.9 ° C

The refrigerant gas of 53.2 ° C discharged from the compressor 1 in this manner is added to the additional air cooling condenser 2B.
Enters and exchanges heat with the atmosphere at 17.4 ° C, and the atmosphere becomes 20.
The temperature rises to 4 ° C, the refrigerant gas falls to 32.6 ° C and enters the ordinary air-cooled condenser 2A, exchanges heat with the atmosphere at 13.8 ° C, and the atmosphere rises to 17.4 ° C. Gas is 2
It descends to 2.1 ° C, releases all heat release calories and completely condenses, is sent to an expansion valve and is decompressed and enters the evaporator to evaporate, cools the case and evaporates at 4.1 ° C. Exit the vessel and enter the compressor at 7.1 ° C. The inside of the case is cooled to 0.1 ° C to cool the contents. This refrigerating case has been used without any problem for a long time.

[0019]

According to the present invention, the heat pump can be operated using the new alternative refrigerant gas HFC134a which does not affect the ozone layer. Operation with an HFC-based refrigerant gas other than 134a is possible. Since heat can be exchanged for both the additional air-cooling condenser 2B and the normal air-cooling condenser 2A with one blower fan, the heat pump can be downsized and
The retrofit of the heat pump currently used becomes easy.

[Brief description of drawings]

FIG. 1 is a blower fan 6 installed between an additional air-cooling condenser 2B and a normal air-cooling condenser 2A.
2B is a schematic diagram showing a configuration in which the air sucked through the normal air-cooling condenser 2A is passed to the additional air-cooling condenser 2B.

[FIG. 2] An additional air-cooling condenser 2B and a normal air-cooling condenser 2A are arranged, a blower fan 6 is installed on the outside of 2A, and the air blown toward 2A by the blower fan 6 and the atmosphere passing through the normal air-cooling condenser 2A is Additional air-cooled condenser 2
It is a schematic diagram showing the composition which passed B.

[FIG. 3] An additional air-cooled condenser 2B and a normal air-cooled condenser 2A are arranged, a blower fan 6 is installed on the outside of 2B, the air is sucked by the blower fan 6, and the air passing through the normal air-cooled condenser 2A is additionally air-cooled. 6 is a schematic diagram showing a configuration for passing a condenser 2B.

FIG. 4 is a schematic diagram showing a configuration in which an additional air-cooled condenser 2B and a normal air-cooled condenser 2A are arranged, and an air blower fan 6 attached to the upper portion allows the atmosphere to pass through both the additional air-cooled condenser 2B and the normal air-cooled condenser 2A. .

[Explanation of symbols]

 1 ... Compressor 2A ... Normal air-cooled condenser 2B ... Additional air-cooled condenser 3 ......... Expansion valve 4 ......... Evaporator 5 ... …… Gas pipe 6 ………… Blower fan 7 ………… Atmosphere guide plate 8 …… … Atmospheric flow

Claims (4)

[Claims] 1. A compressor 1, an additional air-cooled condenser 2B, a normal air-cooled condenser 2A, an expansion valve 3, and an evaporator 4.
2A with air-cooled condenser
B is installed in plural, and a blower fan 6 is attached between 2A and 2B so that the atmosphere passes through 2A and then passes through 2B. The refrigerant gas discharged from the compressor 1 is sent to the air-cooled condenser 2B and the air-cooled condenser 2A. The air-cooled condenser of the heat pump, which exchanges heat with the atmosphere sent through the air-cooled condenser 2A, and then sends it to the air-cooled condenser 2A to exchange heat with the atmosphere sucked by the blower fan 6. 2. A compressor 1, an additional air cooling condenser 2B, a normal air cooling condenser 2A, an expansion valve 3 and an evaporator 4.
2A with air-cooled condenser
A plurality of Bs are installed, and a blower fan 6 is attached to the outside of 2A so that the air blown from the blower fan 6 passes through 2A and then passes through 2B, and the refrigerant gas discharged from the compressor 1 is cooled by an air-cooled condenser 2B. Send to 2
After exchanging heat with the atmosphere passing through A, it was sent to 2A to exchange heat with the atmosphere blown out from the blower fan 6.
Air-cooled condenser for heat pump. 3. A compressor 1, an additional air cooling condenser 2B, a normal air cooling condenser 2A, an expansion valve 3 and an evaporator 4.
2A with air-cooled condenser
A plurality of Bs are installed, an air blower fan 6 is attached to the outside of 2B, the air is sucked by the air blower fan 6, and the air passes through 2A and then passes through 2B.
An air-cooled condenser of a heat pump configured to send the refrigerant gas discharged from the air-cooled condenser 2B to exchange heat with the atmosphere passing through 2A and then to 2A to exchange heat with the atmosphere sucked by the blower fan 6. 4. A compressor 1, an additional air-cooled condenser 2B, a normal air-cooled condenser 2A, an expansion valve 3, and an evaporator 4.
2A with air-cooled condenser
A plurality of Bs are installed, the blower fan 6 is attached to the upper part, and the blower fan 6 sucks in and blows out the air so that the air can pass through both the air-cooled condensers 2B and 2A by the blower fan 6 alone, and is discharged from the compressor 1. The cooled refrigerant gas is sent to the air-cooled condenser 2B to exchange heat with the atmosphere, and then to the air-cooled condenser 2A to exchange heat with the air-cooled condenser of the heat pump.