JPS59158967A - Method of condensing refrigerant in refrigeration cycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for operating a refrigerator year-round, and particularly to a method for condensing refrigerant in a refrigeration cycle.

[Technical background of the invention and its problems]

In the operation of conventional refrigerators, either a fumigation condenser or a water-cooled condenser is used for the condenser.In the case of an evaporative condenser, Since the condensing temperature is about 5C above the outside air temperature, it is about 35C to 40C in summer operation and about IOC in winter operation.In addition, in the case of a water-cooled condenser that uses groundwater as cooling water, the temperature of groundwater is Since there is no big difference between summer and winter, which is about 15C, the condensing temperature is about 25C throughout the summer and winter operations.

By the way, when operating a refrigerator, a difference in condensing temperature causes a large difference in refrigerating capacity and required power.

Next, to explain this, the total discharge amount (V
H+VL, only 1. (vH indicates the discharge amount on the high stage side, VL indicates the discharge amount on the low stage side) 100F7//H, and when the evaporation temperature of the refrigerant is constant at -35C, the refrigerating capacity etc. for the condensation temperature of the refrigerant are as follows. As shown in the table.

As shown in this table, there is an advantage in operating a refrigerator that the lower the condensation temperature of the refrigerant, the greater the refrigeration capacity and the lower the required power. Condensing temperature is 10C and 45
In C, K100:
This results in a difference in required power of 178.

All conventional refrigerators are operated with capacity and power determined based on the highest condensing temperature in summer. Therefore, when operating conventional refrigerators that use evaporative condensers, there is the problem of whether or not it is possible to somehow lower the condensing temperature in the summer. I was wondering if it would be possible to somehow lower the condensing temperature of the equipment I use in the winter (I had 5 problems).

[Purpose of the invention]

The purpose of the present invention is to reduce the horsepower required throughout the year and reduce the condensing temperature by switching to the lower of the outside air temperature or the underground water temperature to condense the refrigerant throughout the year. The purpose is to solve the problems of the prior art.

[Summary of the invention]

According to the present invention, when the temperature of groundwater is lower than the temperature of outside air,
The refrigerant condensing section circulates groundwater and uses its sensible heat to condense the refrigerant.When the temperature of the outside air is lower than the temperature of the groundwater, the refrigerant condensing section is placed under ventilation and water is sprayed there. The present invention relates to a refrigerant condensation method in one refrigeration cycle that condenses refrigerant using the latent heat of vaporization of collected water.

In addition, the present invention places two types of refrigerant condensing sections side by side in one refrigeration cycle and switches between the two refrigerant condensing sections, and when the temperature of the ground water is lower than the temperature of the outside air,
Groundwater is passed through one refrigerant condensing section, and its sensible heat is used to condense the refrigerant.When the temperature of the outside air is lower than the temperature of the groundwater, the other refrigerant condensing section is placed under ventilation, and the refrigerant is condensed there. The present invention relates to a refrigerant condensing method in one refrigeration cycle in which water is sprayed and refrigerant is condensed using the latent heat of vaporization of collected water.

Further, in the present invention, when the temperature of the groundwater is lower than the temperature of the outside air, the groundwater is made to flow through the refrigerant condensing section and the refrigerant is condensed using the sensible heat. sprays water during ventilation to evaporate collected water,
The water is cooled by the latent heat of evaporation, and the cooled water is passed through the refrigerant condensing section instead of ground water, and the sensible heat of the cooling water is utilized to condense the refrigerant. Na51
This invention relates to a refrigerant condensation method in two refrigeration cycles.

Further, in the present invention, when the temperature of the groundwater is lower than the temperature of the outside air, the groundwater is made to flow through the refrigerant condensing section and the refrigerant is condensed using the sensible heat; , relates to a refrigerant condensing method in one refrigeration cycle, in which the refrigerant condensing section is placed under ventilation, water is sprayed thereto, the collected water is evaporated, and the refrigerant is condensed using the latent heat of evaporation.

[Embodiments of the invention]

Next, the present invention will be explained based on examples.

Figure 1 shows Embodiment 6 (1) in which two types of condensers, an evaporative condenser and a water-cooled condenser, are used selectively.

The low-pressure vaporized gas sucked in from the conduit (5) is compressed by the compressor (1) to which the power of the electric motor (2) is transmitted through the V-belt (3), and is turned into high-pressure, high-temperature gas and discharged into the conduit (4).

When the temperature of the well water (17) is lower than the temperature of the outside air, the high-pressure, high-temperature gas passes through the switching valve (9) and enters the shell-and-tube type water-cooled condenser 211, where it is pumped by pump CI8 and sent through the conduit α force. The well water (17) Ic is cooled through the cooling pipe (2z), condensed and liquefied into high-pressure liquefied gas, passed through the conduit (to), the switching valve 4, and reached the liquid receiver (6) via the conduit (4υ). The vessel is an outflow pipe for well water a7).

In addition, when the temperature of the outside air is lower than the temperature of the well water (17), the high-pressure, high-temperature gas enters the condensing coil +261 in the evaporative condenser (name of the evaporative condenser) via the switching valve (branch), where it enters the water receiving tank (capital). The water collected in the pump is pumped, passed through the pipe (c) and sent to the sprinkler (7).
) is cooled by the water sprinkled by the blower el13 and the air ventilated by the blower el13, it condenses and becomes a high-pressure liquefied gas.
6). G21 is a water supply pipe within the surface of the water tank.

A water-cooled condenser (2!L) and an evaporative condenser (c) are not used together; either one of them is used as described above. The condenser on the other side will be used.The receiver (6
) The high-pressure liquid exits the dryer filter (where moisture, foreign matter, etc. are removed by force, and passes through the conduit (8) to the refrigerant heat exchanger (9).
The liquid is cooled and becomes a high-pressure supercooled liquid, and the pressure is reduced by the expansion valve 0ω to become a low-pressure, low-temperature wet gas, which enters the evaporator coil ff21 in the evaporator (11). Here, the air blown by the blower a3 gives heat and evaporates, becoming a low-pressure vaporized gas, which enters the refrigerant heat exchanger (9) through the conduit a4J, where heat is exchanged, and the humid gas becomes a low-pressure superheated gas and passes through the conduit. (5
) and is sucked into the compressor (1) to complete the cycle.

According to this embodiment, in the summer, a water-cooled condenser using well water is used to set the condensation temperature to around 25C, and in the winter, an evaporative condenser is used to set the condensation temperature to 1°C. Therefore, by incorporating the advantages of both condensers, it is possible to increase the refrigerating capacity and reduce the required power by lowering the condensing temperature. Incidentally, when only the evaporative condenser (c) is used in the summer, the condensing temperature is 35C, so according to this embodiment, the condensing temperature can be lowered to around 25C.

Figure 2 shows Example 1 in which only a shell-and-tube type water-cooled condenser is used, and the cooling fluid flowing through the cough condenser is switched to well water or cooling water using a cooling tower.
2). The low-pressure vaporized gas sucked in from the conduit (5) is compressed by the compressor (1) to which the power of the electric motor 12) is transmitted by the 1V belt (3), and becomes high-pressure and high-temperature gas, which is discharged to the conduit (4) and condensed in a water-cooled system. Enter the vessel.

If the temperature of the well water αη is lower than the temperature of the outside air, the well water a? )
Accordingly, the high pressure and high temperature gas is cooled and condensed into liquid through the cooler n.

Also, when the temperature of the outside air is lower than the temperature of the well water (17), the switching valve 09 is closed and the switching valve is opened, and the water evaporatively cooled by the cooling tower (49) is pumped (47) 1,
It enters the water-cooled condenser ρ1 via the switching valve (4s, conduit node), cools the high-pressure high-melting gas, and condenses it into liquefaction. The heat-exchanged water flows out from the cooling pipe to the outflow pipe, enters the cooling tower (451) through the switching valve 15 (9), is sprayed with water from the internal water sprinkler (451), evaporates, and is cooled by the latent heat of evaporation. The pump (water is sent by four forces) is a supply pipe for water from the well water pump (17) marked α to the cooling tower (c).In addition, the switching valve ( 1!J (c) is for switching water supply, and the switching valve (41i51 is for switching water circulation).

The high pressure liquid condensed and liquefied as described above is transferred to the liquid receiver (6).
After passing through the dryer filter (7), moisture and foreign substances are removed, and the liquid passes through the conduit (8) and is cooled in the refrigerant heat exchanger (9) to become a high-pressure supercooled liquid, which is then depressurized by the expansion valve 00 and becomes a low-pressure, low@humid gas. , evaporator coil (12
Enter 1. Here, the air blown by the blower (131) gives heat and evaporates, becoming a low-pressure vaporized gas.
The humid gas enters the C refrigerant heat exchanger (9) through the conduit circle, where it exchanges heat and becomes a low-pressure superheated gas, which is sucked into the compressor (1) via the conduit (IQ) to complete the cycle.

According to this embodiment, the condensation temperature can be raised to around 25C using well water in the summer, and 15C using the cooling tower in the winter, so both well water and cooling water using the cooling tower can be used. By incorporating the advantages of cooling water, it is possible to increase the refrigerating capacity and reduce the required power by lowering the condensing temperature. By the way, when this example is not used, the condensation temperature is around 257r in winter.

Next, an example of the 3-year-old figure (3-year-old) will be described. This embodiment is a refrigerant condensing method that utilizes either the original operating function of the evaporative condenser or only the sprinkling of well water that is lower than the outside temperature. The low-pressure vaporized gas sucked in from the conduit (5) is compressed and compressed by the compressor (1) transmitted by the belt (3), becomes a high-pressure high-temperature gas, and is discharged to the conduit (4), where it is sent to the evaporative condenser. It enters the condensing coil r261 inside.

When the temperature of the well water is lower than the outside air temperature, such as during summer, the pump (L), the switching valve (L9, the conduit,
Cooling is achieved by sprinkling the well water a'D, which is sent by the conduit, from the water sprinkler CI to the evaporative condenser (c) with a larger amount of well water for sensible cooling than the normal water sprayer (the blower is not operated). and condenses.

Also, in winter etc. well water a'? ) When the temperature of the outside air is lower than the temperature of the outside air, the water in the water tank 12'0 is blown from the pump ball, the switching valve (33, water is sprayed from Masuda via the conduit, and the air is blown from the air blower). It is cooled and condensed by the moisture heat of evaporation from the outside air.G2 is a supply pipe for water to the water tank (27).The high-pressure liquefied gas that has been liquefied and condensed passes through the pipe (G) and enters the liquid receiver (6). , and a dryer filter (7
), moisture and foreign matter are removed, and the gas flows through the conduit (8) toward the evaporator (111).The process until the low-pressure gas is sucked into the compressor (1) again is as described above. Since it is the same as that of the first embodiment (Fig. 1) and the second embodiment (Fig. 2), the explanation will be omitted. Note that the same reference numerals represent the same structural parts.

Further, in this embodiment, switching between using the condenser as an original evaporative condenser and using sensible heat cooling using well water is performed when the condensing temperature at that point becomes low.

In this embodiment, if there is water with a temperature lower than the outside temperature in the summer (for example, well water (15C to 16C throughout the year)), use this water, and sprinkle a large amount of water from the water sprinkler at the top of the evaporative condenser. The refrigerant is condensed and liquefied by the chisel to lower the condensing temperature. At this time, the condensation temperature becomes 25C. Also, when the temperature of the outside air is lower than the temperature of the well water, the original evaporative condenser operation method is used. At this time, the condensation temperature can be set to IOC. In this way, by incorporating the advantages of both of the above-mentioned cooling methods, it is possible to increase the refrigerating capacity and reduce the required power by lowering the condensing temperature.

〔Effect of the invention〕

The present invention differs from the prior art in which refrigerant is condensed using either an evaporative condenser or a water-cooled condenser; the present invention switches between well water or outside air cooling means, and At the time of use, the refrigerant condensation temperature is lower (lower cooling means), so the refrigerant condensation temperature can be kept low throughout the year, increasing the refrigerating capacity and increasing the new power. Since it is possible to reduce the amount of energy used, it is possible to save energy.

[Brief explanation of drawings]

Figures 1 to 3 are piping system diagrams of embodiments of the present invention. (1)・ψ compressor, (6)-・liquid receiver, (11)-・evaporator, (i7)・・well water, el! I) - Water-cooled condenser as a refrigerant condensing section, C9... As a refrigerant condensing section,
Evaporative condenser, □□□...Water tank, CjQ m water sprinkler, (451...Cooling February 28, 1982)

Claims (1)

[Claims] +11 When the temperature of groundwater is lower than the temperature of outside air,
Groundwater is passed through the refrigerant condensing section, and its sensible heat is used to condense the refrigerant.When the temperature of the outside air is lower than the temperature of the groundwater, the refrigerant condensing section is placed under ventilation and water is sprayed there. A refrigerant condensation method in one refrigeration cycle that condenses refrigerant using the latent heat of vaporization of collected water. (2) When the temperature of the groundwater is lower than the temperature of the outside air, the groundwater is circulated through the refrigerant condensing section in l, and the refrigerant is condensed using the sensible heat; , the other refrigerant condensing section is placed under ventilation, water is sprayed there, and the refrigerant is condensed using the latent heat of vaporization of the collected water.
A refrigerant AM method in one refrigeration cycle that uses different types of refrigerant condensing sections. (3) When the temperature of groundwater is lower than the temperature of outside air,
Groundwater is passed through the refrigerant condensing section, and its sensible heat is used to condense the refrigerant.When the temperature of the outside air is lower than the temperature of the groundwater, water is sprayed during ventilation to evaporate the collected water, and the evaporation A refrigerant condensing method in 51 refrigeration cycles, in which collected water is cooled by latent heat, the cooled water is switched to flow through the refrigerant condensing section, and the refrigerant is condensed using the sensible heat of the cooling water. (4) When the temperature of the groundwater is lower than the temperature of the outside air, the groundwater is circulated through the refrigerant condensing section and the refrigerant is condensed using the sensible heat, and when the temperature of the outside air is lower than the temperature of the groundwater, the A refrigerant condensing method in a 51 refrigeration cycle, in which the refrigerant condensing section of is placed under ventilation, water is sprayed there to evaporate the collected water, and the refrigerant is condensed using the latent heat of evaporation.