JP2000105017A - Reconstructing method of water-cooled chiller type cooler and cold water circulating type cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reconstruct an existing motor-driven water-cooled type cooler for an indoor machine, which is equipped with a condenser, an evaporator and a fan coil unit, into an engine-driven water-cooled type cooler. SOLUTION: A compression pump for compressing the vapor of heat transfer medium and an electric motor for driving the same which are provided in an already installed water-cooled chiller type cooler are removed, and an engine 11 is installed as an outdoor machine to drive the rotation of an engine-driven type compression pump 12 for compressing the vapor of heat transfer medium by the engine 11. In accordance with this method, a part of a heat transfer medium circulating pipeline is extended to the outside of a room to lay the same at the outside of the room and connect the same to the engine-driven type compression pump 12, whereby heat transfer medium in the circulating pipeline repeats a refrigerating cycle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for remodeling a water-cooled chiller type cooling device driven by an electric motor to an engine drive type, and a chilled water circulation type cooling device converted to an engine drive type. It is.

[0002]

2. Description of the Related Art FIG. 3 is a schematic system diagram showing a conventional example of a water-cooled chiller type cooling device of an electric motor drive type, in which arrows indicating the circulation flow direction of a heat transfer medium and the circulation flow direction of cold water are shown. FIG. 4 is an explanatory view of the structure and function, in which an arrow indicating the direction of circulation of cooling water and an arrow indicating the direction of circulation and flow of cooling water are written.

A package pump 1 generates a driving force of the water-cooled chiller type cooling device, and compresses and discharges by sucking steam of an alternative chlorofluorocarbon (HCFC) as a heat transfer medium. The compression pump 1a and the electric motor 1b for rotating the compression pump are integrally connected and sealed in a can. The electric drive type compression pump 1a sucks the vapor of the heat transfer medium as shown by an arrow a, compresses it, and discharges it as shown by an arrow b. The temperature of the discharged heat transfer medium vapor has increased due to the adiabatic compression phenomenon. The heat transfer medium vapor compressed to a high temperature as described above flows through the condenser 2 as indicated by arrows b and c. The condenser 2 is a heat exchanger provided with a cooling tower 5, and a cooling water pump 4 rotationally driven by a cooling water pump driving motor 3 circulates cooling water as indicated by arrows d and e. The heat transfer medium vapor flowing into the condenser 2 as shown by the arrow b is cooled and liquefied, and the heat transfer medium liquid flows through the expansion valve 6 as shown by the arrow c and is sent to the evaporator 7. The expansion valve 6 is an important component for controlling the flow rate of the heat transfer medium. If the flow rate is insufficient, the water-cooled chiller-type cooling device cannot exhibit the desired cooling capacity.
If the flow rate is too large, there is a risk that the heat transfer medium vapor discharged from the compression pump 1a will be overheated, or that droplets will be mixed into the suction heat transfer medium vapor of the compression pump 1a to wear out the compression pump 1a. This is extremely inconvenient.

[0004] The heat transfer medium liquid flowing into the evaporator 7 expands and evaporates in the evaporator 7, absorbs latent heat of vaporization, and becomes low in temperature. The evaporator is a heat exchanger that cools chilled water with a low-temperature heat transfer medium, and a chilled water pump 8 that is rotated by a chilled water pump drive motor 9 circulates chilled water as indicated by arrows f and g. . The cold water cooled in the evaporator 7 circulates through the fan / coil unit 10, which is an indoor unit, and performs a cooling function by blowing indoor air and exchanging heat therewith. The heat transfer medium vapor, which has taken heat from the cold water in the evaporator 7, rises in temperature and is sucked into the compression pump 1a as indicated by an arrow a, and the above-described cooling cycle of compression → condensation → expansion → evaporation is repeated. Conventionally, generally, the cooling tower 5 is installed outdoors. The other main components such as the package pump 1, the condenser 2, the evaporator 7, and the fan / coil unit 10 are installed indoors.

[0005]

FIG. 3 shows an example of a conventional water-cooled chiller-type cooling device. The history of the change with technological progress and changes in the historical background will be described. Have. The main changes in the above are changes in the heat transfer medium (commonly known as refrigerant / fluorocarbon) and changes in the equipment that rotates the pump that compresses the heat transfer medium vapor. Hereinafter, these will be sequentially described. Fluorocarbon is widely used as a heat transport medium, and various types of chlorofluorocarbon are known and used. "Freon" is a common name in Japan for a compound in which part or all of the hydrogen atoms of a compound having a methane group or an ethane group are replaced with a halogen element such as fluorine or chlorine. In Europe, there is no general name corresponding to this CFC. But,
Since the classification of CFCs is necessary for understanding the present invention, an outline of the classification of CFCs will be described below, and the names of the classified CFCs will be defined. This type of compound is classified into three types, CFC, HCFC, and HFC, in terms of molecular structure. CFC has a chemical structure in which all of the hydrogen atoms of a compound having a methane group or an ethane group are replaced with fluorine or chlorine, and there is a high risk of destruction of the ozone layer and pollution of chlorofluorocarbons. It is legally regulated as a specific CFC, and is now banned from production and has disappeared from the market.

[0006] HCFC is an abbreviation of hydrochlorofluorocarbon, and has a small ozone depletion coefficient (for example, a typical HCFC, Freon R22, has an ozone depletion coefficient of 0.055), and is called an alternative fluorocarbon. However, since this alternative chlorofluorocarbon (HCFC) also has a non-zero ozone depletion potential, its total amount was regulated in 1996,
It is to be reduced significantly by the year. Further 2022
It is expected to be completely abolished by the year. HFC is an abbreviation for hydrofluorocarbon, has an ozone depletion potential of zero, and is called a new alternative substance. As those belonging to the HCFC, Freon R22, Freon R123, Freon R
225 etc. In the present invention, these are generically referred to as alternative CFCs (HCFCs) (strictly speaking, they are HCFCs CFCs). In addition, Freon 13 belongs to HFC.
4a, Freon R32, Freon R125 and the like. In the present invention, these are collectively referred to as new substitute substances (HFCs) (strictly speaking, they are HFCs). Among the water-cooled chiller type air conditioners, those having a relatively old manufacturing age use an alternative chlorofluorocarbon (HCFC) as a heat transfer medium, and those having a relatively new manufacturing age use a new alternative material (HFC). I have.

In the conventional water-cooled chiller type cooling apparatus shown in FIG. 3, a compression pump 1a for vapor compression of a heat transfer medium is rotationally driven by an electric motor 1b. And a water-cooled chiller type cooling device. In addition, the cooling water pump 4, the cooling water pump 8, the fan of the cooling tower 5, and the energy source for rotationally driving the fan coil unit are required. However, the energy consumption of these auxiliary devices is relatively small. Most of the power consumed by the water-cooled chiller type cooling device is due to the rotational drive of the compression pump 1a. Although not shown, some of the water-cooled chiller-type cooling devices manufactured and supplied relatively recently include a system in which a compression pump for vapor compression of a heat transfer medium is driven by an engine. The above engines include diesel and gasoline engines,
In addition, a gas engine using city gas or liquefied petroleum gas as a fuel is included, and each has an advantage. The emergence of the engine-driven water-cooled chiller type cooling system has both an economic purpose of reducing energy costs and a social purpose of leveling electric power load which contributes to the public interest. Hereinafter, it will be described in order as follows.

[0008] The cost of electric energy as a power source for rotary driving is generally considered to be inexpensive. However, it is not necessarily inexpensive if a large power consumer takes into account the installation and maintenance of the receiving equipment. Furthermore, considering the recent cooling of office buildings, the required power for office work automation (commonly called OA) is rapidly increasing. Lighting and cooling and heating are the main components of the power consumption of office buildings in the past, and the initial power for OA was covered by allocating the margin of power consumed for "lighting and cooling". However, as the required power for OA increases, the total amount of “power for lighting + power for cooling / heating + power for OA” tends to exceed the power receiving capacity in office units. Under these circumstances,
If the drive energy source of the water-cooled chiller-type cooling device can be switched from electric power to engine, the energy unit cost including the power receiving equipment in office units can be reduced.
For these reasons, switching of the drive source of the existing water-cooled chiller type cooling device from electric power to the engine is also demanded from the viewpoint of reducing running costs. In this case, the purpose is achieved by replacing the electric motor 1b for vapor compression of the heat transfer medium, which accounts for the majority of the power consumption (see FIG. 3), with an engine (not shown). Other motors (Chilled water pump driving motor 3, Chilled water pump driving motor 9, and fan driving motor for cooling tower 5 and fan / coil unit 10)
Is because the power consumption is relatively small. Further, if the small generator is driven to rotate by the engine (not shown), the power consumption of the auxiliary equipment can be supplied.
In this case, attaching a small generator to an alternative engine (not shown) is not a special disadvantage. The reason for this is that stationary engines and vehicle engines are generally equipped with a generator for charging the battery for driving the cell motor. By setting the capacity of the generator large, the power for auxiliary equipment can be covered. The current stored in or supplied from the battery is DC, but it is easy to drive and control an AC motor for auxiliary equipment by applying known inverter technology.

[0009] The power consumed by cooling air conditioning is concentrated during the daytime in summer. As a result, the annual load factor (the ratio of the average power to the maximum demand for one year) has been decreasing year by year. It decreased to 55%. Pumped-storage power generation and latent heat cooling are being studied in order to store power during the seasons and times when power surplus occurs, but it has not been possible to improve the power demand balance as a whole country. Under the situation where saving energy is becoming an important issue of the national economy, the situation that the annual load rate of electricity continues to decline cannot be left unchecked, so the electric power business, an advisory body of the Minister of International Trade and Industry, The Basic Policy Subcommittee of the Council has set up a power load leveling subcommittee and has set out various measures to improve the power load factor (that is, power load leveling). For example, it is one idea to add a punitive electricity rate to the power consumption that goes against the leveling of the power load. Switching to an internal combustion engine (commonly called an engine) is expected to have the most direct effect. The present invention has been made in view of the above-described circumstances, and taking into account the changes in the types of chlorofluorocarbon as the heat transfer medium described above, the existing electrically driven water-cooled chiller-type cooling device is used. Engine-driven (internal combustion engine driven for liquid fuel and gaseous fuel) was remodeled to reduce the energy cost of water-cooled chiller type cooling system to reduce running cost, and to contribute to power load leveling, the existing water-cooled chiller type An object of the present invention is to provide a method of continuously using components of a cooling device as effectively as possible, and a water-cooled chiller-type cooling device modified as described above.

[0010]

The basic principle of the present invention created to achieve the above object will be briefly described with reference to FIG. 1 corresponding to one embodiment. That is, in order to modify an existing electric water-cooled chiller type cooling device provided with a condenser 2 as an indoor unit, an evaporator 7 and a fan / coil unit 10 so as to be engine driven, the existing water-cooled chiller type air conditioner is used. The compression pump for vapor compression of the heat transfer medium and the electric motor for driving the same (both of which are not shown in the figure) are removed from the apparatus, and the engine 11 is installed as an outdoor unit. The engine-driven compression pump 12 for vapor compression is rotationally driven.
Along with this, a part of the heat transfer medium circulation pipe is extended outside and connected to the engine driven compression pump 12,
The heat transfer medium in the circulation line repeats a refrigeration cycle.

In accordance with the first aspect of the present invention, the method of the present invention is based on the principle described above. A compression pump which sucks the vapor of the heat transfer medium and compresses and protrudes, and is connected to the compression pump and driven to rotate. An electric motor, a condenser for cooling and liquefying the vapor of the heat transfer medium compressed by the compression pump, a cooling water pump and a cooling water pump driving motor for circulating cooling water through the condenser, and the circulating pump. A cooling tower that air-cools the cooling water, an expansion valve that controls the flow rate of the heat transfer medium liquid liquefied by the condenser, and evaporates the heat transfer medium liquid that has passed through the expansion valve to cool the cold water. An evaporator, a chilled water pump and a chilled water pump drive motor for circulating chilled water through the evaporator, and a fan / coil unit for cooling the room air by circulating the chilled water. In the method of converting the main driving energy source from electric power to liquid or gaseous fuel by modifying the driving part of the electrically driven water-cooled chiller type cooling device, the vapor of the heat transfer medium is sucked, compressed and discharged. While removing the compression pump and the electric motor for rotationally driving the compression pump, piping work is performed on a portion where the compression pump is connected in the circulation line of the heat transfer medium, and the heat transfer medium circulation line is A part extends outside the room, and an engine is installed outside the room. An engine-driven compression pump is mounted on the engine, and the compression pump is connected to the “extension portion of the heat transfer medium circulation pipe”. With
The evaporator, the chilled water pump, the chilled water pump drive motor, and the fan / coil unit for cooling the indoor air are kept almost as they are, or after repairing the worn parts, the installation position of these devices and the chilled water circulation. It is characterized by being continuously used without greatly changing the piping position of the pipeline. According to the method of the first aspect described above, the compression pump for the heat transfer medium mounted on the water-cooled chiller type cooling device to be remodeled is removed together with the drive motor thereof and replaced with an engine-driven compression pump. Therefore, it became possible for the first time to replace an electric motor with an engine. Just looking at the piping system diagram of the refrigeration cycle connected to the components in an abstract view requires extra creativity to replace the electric motor that composes the electrically driven water-cooled chiller type cooling system with the engine. Although the illusion is easy to avoid, the heat transfer medium vapor compression pump of the existing water-cooled chiller type cooling device and the electric motor for driving it are integrally sealed inside the can, and only the electric motor for driving is replaced with the engine I can't do that. In the method according to the first aspect of the present invention, the combination of the “heat transfer medium vapor compression pump and the electric motor for driving the heat transfer medium vapor compression pump”, which constitute the existing water-cooled chiller type cooling device, is removed, and the “engine driven type” is removed. By installing the combination of the compression pump and the engine driven compression pump driving engine, actual remodeling work becomes possible. Furthermore, since the electric motor for driving the compression pump in the water-cooled chiller type cooling device before the modification is installed as an indoor unit, it cannot be simply replaced with an engine. According to the configuration of the present invention corresponding to the conditions of the apparatus to be remodeled, a part of the heat transfer medium circulation pipe extends outside the room, and an engine-driven compression pump is connected to the extension to drive the heat transfer medium circulation pipe. Engine can be installed outdoors. As a result, the water-cooled chiller-type cooling device is driven by the engine, and the supply of electric power is made unnecessary or greatly reduced. The power savings met the public demand for power leveling. In addition, since the energy source of the water-cooled chiller-type cooling device is converted from electric power to fuel (any one of liquid fuel and gaseous fuel can be used or mixed), the energy cost is reduced, and the water-cooled chiller-type cooling device is further reduced. Running costs are reduced. As a further effect, since the capacity of the power receiving equipment allocated to the power consumption of the water-cooled chiller type cooling device can be given a margin, the office office OA can be provided.
Power can be generated.

According to a second aspect of the present invention, in addition to the constituent elements of the first aspect of the present invention, a cooling tower for cooling the cooling water by air and a cooling tower between the cooling tower and the condenser are provided. A pipe for circulating water, and
The cooling water pump and the cooling water pump drive motor interposed and connected in the cooling water circulation pipe are to be used as they are, or after repairing a worn portion, the installation positions of these devices are largely changed. It is characterized by being continuously used without any. According to the above-described method of the second aspect of the present invention, the cooling tower, which is the main outdoor equipment of the existing water-cooled chiller type cooling device, and the "cooling that connects the cooling tower with the condenser, which is the indoor equipment," The water circulation line, and the cooling water pump and its drive motor interposed and connected in the circulation line are effectively used continuously without being discarded or stopped, so that these devices are removed. The required man-hours and required equipment costs for the construction are smaller than in the case, and the industrial waste generated during the construction is reduced, which can be in the public interest. This cooling tower and its attachments were originally designed as equipment for supplying cooling water for a water-cooled chiller type cooling system before remodeling, with its capacity and characteristics matched to the condenser, evaporator and fan / coil unit. Since it is manufactured, by applying the present invention, it is necessary and sufficient to maintain the cooling capacity of the water-cooled chiller type cooling apparatus before the modification even after the modification. In other words, when the water-cooled chiller-type cooling device is modified by applying the present invention 2, the main indoor equipment (condenser, evaporator, fan / coil unit) before the modification is “heat-conveying medium vapor compression”. It is sufficient to match the capacity and characteristics of the "pump and its driving engine". For the system that supplies cooling water to the condenser, no special consideration is needed for the capacity and characteristics, and it is sufficient to perform the necessary repairs. . The method according to the second aspect of the present invention is suitable when there is a sufficient space for installing the engine outdoors.

According to a third aspect of the present invention, in addition to the constituent elements of the first aspect of the present invention, a cooling tower for cooling the cooling water by air and a cooling tower between the cooling tower and the condenser are provided. A pipe for circulating water, and
The cooling water pump and the cooling water pump driving motor which are inserted and connected in the cooling water circulation pipe are removed, and the air is brought into contact with the radiator pipe through which the heat transfer medium flows and the outer peripheral surface of the radiator pipe. A radiator fan and an “air-cooling unit that includes a fan drive motor that rotationally drives the radiator fan and that functions as a condenser”
Is installed outside the room instead of the cooling tower, and the inflow end of the radiator pipe is connected to the discharge port of the engine-driven compression pump by connecting piping, and the outflow end of the radiator pipe is connected. The heat transfer medium vapor discharged from the engine-driven compressor is circulated and flowed to the radiator pipe by connecting piping to the evaporator directly or via an expansion valve in series.
According to the method of the present invention described above, an air cooling unit, which is a smaller device, is installed instead of the cooling tower, which is an outdoor device of the existing water-cooled chiller type cooling device, so that the outdoor unit can be installed. You can have a lot of space. Therefore, an engine for driving the compression pump can be arranged in the extra space. As a basic configuration of a series of inventions according to the present application, in order to switch a compression pump drive source for vapor compression of a heat transfer medium of an existing water-cooled chiller type cooling device from an electric motor (indoor equipment) to an engine (outdoor equipment), An outdoor space is required to implement these inventions. In recent building circumstances, the margin of the outdoor space is not always sufficient, and there are many cases where the implementation of the remodeling is restricted due to unexpectedness of the engine installation space. In such a case, the practical value of the present invention in which the space occupied by the installation of the cooling tower can be diverted as the space for installing the engine is very large. Since the cooling tower circulates water by contacting it with the atmosphere, there is a danger that microorganisms will propagate, dust will be mixed in, or will be reduced by evaporation. An air-cooling unit equipped with a pipeline does not use cooling water and circulates and flows water so that it does not come into contact with the atmosphere. Easy. In addition, since the circulating fluid does not come into contact with atmospheric oxygen or carbon dioxide, these oxidizing gases do not dissolve into the fluid, and there is no risk of accelerating corrosion of the circulating conduit of the fluid.

The structure of the method of the invention according to claim 4 is, in addition to the constituent elements of the method of the invention of claims 1 to 3, the heat sealed in the circulation line of the water-cooled chiller type cooling device to be modified. When the transfer medium is an alternative chlorofluorocarbon (HCFC), the alternative chlorofluorocarbon (HCFC) previously sealed in the circulation system of the heat transfer medium before removing the compression pump that sucks and discharges the vapor of the heat transfer medium. Is a compression pump designed and manufactured as the engine-driven compression pump to inhale, compress and discharge vapor of a new alternative material (HFC), and is still a new alternative material (HF).
C) A new compression pump that is not in contact with, or has been designed and manufactured to inhale and compress and discharge new substitute material (HFC) vapor in the same manner as above, and has a history of contact with the new substitute material (HFC); The compression pump that uses the new substitute material (HFC) that has been washed and removed is used, and the capacity of the engine-driven compression pump is determined regardless of the value of its nominal cooling capacity.
An engine-driven compression pump that has substantially the same discharge flow rate as the water-cooled chiller-type cooling device to be remodeled is connected, and the engine-driven compression pump is connected to the extension of the heat transfer medium circulation pipe, It is characterized by injecting "temporarily stored alternative chlorofluorocarbon (HCFC)" and a required amount of replacement chlorofluorocarbon (HCFC) into the circulation line and sealing them. According to the method of the present invention described above, a new substitute material (HFC) is designed and manufactured in an era when the new substitute material (HFC) has not been widespread yet, and an alternative chlorofluorocarbon (HCF) is used.
When the present invention is applied to an electric drive type water-cooled chiller type cooling device which uses C) as a heat transfer medium and is modified to an engine drive type, the main products of the current marketed products which have been relatively recently developed are Because of the use of a new alternative material (HFC) compression pump, it is easy to obtain the heat transfer medium vapor compression pump, which is a supplementary device required for the remodeling. Maintenance is excellent because supply of spare parts is guaranteed. Furthermore, compression pumps for new alternative materials (HFCs) and their driving engines are relatively recent products, and it is easy to obtain a "combination of compression pump and driving engine" with performance characteristics matched to each other. . In addition, the existing water-cooled chiller-type air conditioner originally designed and manufactured for HCFC is replaced with an engine and converted to an engine. HCFC) is enclosed and operated, so the operating characteristics of the condenser and evaporator that are continuously used after modification in the components of the existing water-cooled chiller type cooling device maintain good matching with the heat transfer medium even after modification. Thus, the respective functions are exhibited, and there is no danger of causing a cooling capacity shortage due to the mismatching or inducing trouble such as overheating due to the mismatching, and the operation reliability is high. In particular, it is not necessary to change the specifications of the expansion valve or to significantly modify the adjustment state of the operation characteristics of the expansion valve, and the test operation and adjustment after the modification are easy.

[0015] The structure of the method according to a fifth aspect of the present invention, in addition to the constituent elements of the method according to the first to third aspects of the present invention, includes a heat transfer sealed in a circulation line of a water-cooled chiller type cooling device to be remodeled. When the medium is alternative Freon (HCFC), after removing the compression pump that sucks and compresses and discharges alternative Freon (HCFC) vapor from the water-cooled chiller type cooling device to be remodeled, the circulation system of the heat transfer medium is changed. Disassembling the joint part of the constituting pipe member and removing all of the seal members used for the joint part or the seal member having insufficient chemical resistance with respect to the new substitute material (HFC) to remove the new substitute material (HFC) is replaced with a sealing member, and the joint of the pipeline is connected. Before and / or after the connection of the above-mentioned joint, an alternative fluorocarbon (H
After washing and removing CFC), vacuum drying is performed to almost completely remove the alternative chlorofluorocarbon (HCFC), and a new alternative substance (HF) is removed.
C) An engine-driven compression pump designed and manufactured to suck and compress and discharge steam is connected, and the capacity of the engine-driven compression pump is larger than the nominal cooling capacity of the water-cooled chiller-type cooling device to be modified. A compression pump having substantially the same nominal cooling capacity, or a compression pump adapted to be compatible with a cooling device having substantially the same nominal cooling capacity as described above. After connecting to the outdoor extending portion of the circulation line, a new alternative substance (HFC) is injected into the circulation line to seal the circulation line. According to the method of the invention described in claim 5, when the electric drive type water-cooled chiller type cooling device is converted into the engine drive type, the compression pump for vapor compression of the heat transfer medium must be necessarily replaced. In consideration of this, the replacement pump for HCFC is replaced with the replacement pump for new substitute material (HFC), and the heat transfer medium is also replaced with the new replacement material (HFC). Even if it leaks into the atmosphere, there is no danger of causing chlorofluorocarbon pollution that destroys the ozone layer. Furthermore, as explained in the section of [Problems to be Solved by the Invention], it is expected that the legal regulations on alternative chlorofluorocarbons (HCFCs) will become more and more strict over the years. By changing the heat transfer medium of the water-cooled chiller type cooling device, which is the equipment to be remodeled by applying to this opportunity, to a completely non-polluting new alternative material (HFC), we will obtain the heat transfer medium as a replenishment material in the future We can expect supply without worry. However, since the new substitute material (HFC) has different physical properties and chemical properties as compared with the substitute chlorofluorocarbon (HCFC), careless replacement should not be performed. Specifically, the latent heat of vaporization is small (for example, about 0.76 times), and the specific gravity (the reciprocal of the saturated steam specific volume) is small (for example, about 0.72 times). Cooling capacity equivalent to that before remodeling cannot be maintained unless fluidized, and both (HFC and HCFC) must not be mixed due to additives, and synthetic rubber for new alternative substances (HFC) If not, there is a problem such as corrosion.
According to the fifth aspect of the present invention, the residual chlorofluorocarbon (HCFC) is strictly prevented from remaining, and the seal material, that is, the gaskets and packings, are replaced with those for the new substitute substance (HFC). Category change (HCFC → HF
The advantage of C) can be enjoyed, and the adverse effects can be completely prevented practically.

According to a sixth aspect of the present invention, in addition to the constituent elements of the fifth aspect of the present invention, a method is provided in which a water-cooled chiller type cooling device to be remodeled is inserted and connected in a heat transfer medium circulation pipe. The expansion valve was replaced with an expansion valve or orifice having a large control flow rate, or an expansion valve or orifice different from the above was additionally connected in parallel with the expansion valve that was interposed, or the control flow rate was changed. By re-adjusting it to increase or replacing components, a new alternative of flow rate that can exhibit cooling capacity almost equivalent to that exhibited by the circulating flow of alternative Freon (HCFC) It is characterized in that the substance (HFC) can be distributed. According to the method of the invention described in claim 6 described above, the replacement of the chlorofluorocarbon (HCFC) with the new substitute material (HFC) can be performed by using the new substitute material (HF).
(C) that the latent heat of vapor of CFC is lower than that of HCFC, and that the specific gravity of the new alternative substance (HFC) (the reciprocal of the saturated vapor specific volume) is lower than that of HCFC. By correcting so as to cancel, it is possible to maintain the cooling capacity equivalent to that of the water-cooled chiller type cooling apparatus before the modification after the modification. Each of the alternative chlorofluorocarbon (HCFC) and the new alternative substance (HFC) is not a single compound but contains various types of fluorocarbons. Alternative Freon (HC
FC) includes, for example, Freon R22 and Freon R123.
And Freon R225, which have different physical properties from each other. In addition, CFC 134a is used as a new substitute substance (HFC).
And Freon R32, Freon 125, etc., which have different physical properties from each other. However, as far as the comparison is made within the range of the generally supplied heat transfer medium, the alternative (FCFC) with the smallest (latent heat of evaporation x specific gravity) is smaller than that of HCFC.
New substitute substance (HFC) with the largest (latent heat of evaporation x specific gravity)
Has a much lower value of "latent heat of vaporization per unit volume" (in short, the refrigerant capacity is inferior). Therefore, the type of heat transfer medium is changed to Freon (HCFC)
However, if the circulating flow rate is not changed simply by switching to the new substitute material (HFC), the cooling capacity of the water-cooled chiller type cooling device before the modification cannot be maintained after the modification. From this point of view, in the method according to the sixth aspect of the present invention, the control flow value of the expansion valve that regulates the circulation flow rate of the heat transfer medium is increased so as to compensate for the decrease in the cooling capacity due to the change in the type of fluorocarbon. The cooling capacity of the water-cooled chiller type cooling device before can be maintained even after the remodeling.

According to a seventh aspect of the present invention, the structure of the apparatus is designed and manufactured by designing and manufacturing the evaporator having a history period H which has been operated as a component of the water-cooled chiller type cooling apparatus, and by linking with the evaporator. A fan / coil unit for cooling indoor air having an operating history period H substantially similar to that of the evaporator, and designed and manufactured in connection with the evaporator and the fan / coil unit to operate substantially the same as these devices. A chilled water pump having a history period H and a chilled water pump driving motor are installed as indoor units, and the evaporator, the fan / coil unit, and the chilled water pump are connected in a ring shape, and are substantially equivalent to these devices. A chilled water circulation line having an operating history period H is installed in the room, and is designed and manufactured separately from the evaporator and the fan / coil unit. And an engine driven compression pump having an operation history period h shorter than the operation history period H of the above, and separately designed and manufactured with the evaporator and the fan / coil unit, and mounted on the engine driven compression pump. And an engine having an operating history period h substantially equal to the engine-driven compression pump,
A refrigeration cycle of “compression → condensation → decompression → evaporation” is formed by the circulation line which is installed as an outdoor unit and is connected in a ring shape including the engine-driven compression pump and the evaporator and the condenser. It is characterized by having been done. According to the apparatus of the present invention described above, a water-cooled chiller-type cooling device having an operating history of an existing electric drive system (in other words, existing used equipment) is used as a base, and the electric drive system equipment is By installing an engine drive device instead, the existing electric drive type water-cooled chiller type cooling device can be easily and inexpensively, and furthermore, the generation of industrial waste is suppressed, and a new engine drive type is provided. A cooling water circulation type cooling device can be configured. The cooling device according to claim 7 uses the engine as a main drive source. That is, a liquid fuel or a gas fuel is used as an energy source. Therefore, the unit cost of energy is low and the running cost is low as compared with a water-cooled chiller type cooling device using electric power as an energy source. In addition, liquid fuel or gaseous fuel is used as the main power source, and even if a small amount of power is consumed for auxiliary equipment, the power consumption does not significantly go against power load leveling. It is necessary to remove the electric motor leaving the electric drive type heat transfer medium vapor compression pump constituting the existing water-cooled chiller type cooling device and install an engine that drives the heat transfer medium vapor compression pump under actual conditions. Is very difficult in (compression pumps for heat transfer medium vapors,
However, it is difficult to divide the drive unit from the electric motor for driving.) However, the apparatus according to the seventh aspect of the present invention is configured by newly installing the "heat transfer medium vapor compression pump and its driving engine" as one set of constituent parts. Therefore, the above difficulties can be solved.

According to an eighth aspect of the present invention, in addition to the constituent elements of the seventh aspect of the present invention, the apparatus is designed and manufactured in connection with the evaporator and the fan / coil unit. A cooling tower having an operation history period H substantially similar to that of the above is installed as an indoor unit, is designed and manufactured in connection with the cooling tower and the condenser, and connects these devices to form a circulation system of cooling water. A cooling water pipe member, and a cooling water pump which is designed and manufactured in connection with the cooling tower and the condenser, has an operation history period H substantially similar to these devices, and is inserted and connected in the cooling water circulation system. , And a cooling water pump driving motor connected to the cooling water pump. Claim 8 described above.
According to the apparatus of the invention, when the existing water-cooled chiller type cooling apparatus is modified to constitute the cooling water circulation type cooling apparatus according to claim 7, the outdoor equipment used as a component of the water-cooled chiller type cooling apparatus to be modified is used. By effectively utilizing most of the units and some of the indoor units, it is possible to reduce the cost of equipment for remodeling and significantly reduce the amount of industrial waste generated. That is, a condenser, a cooling tower that supplies cooling water to the condenser, a cooling water circulation line that connects the cooling tower and the condenser, and a cooling water pump that circulates and flows the cooling water in the cooling water circulation line. When replacing the above devices with other devices without replacing the motor for driving the cooling water pump, it can be reused as it is at the time of the remodeling work or after performing necessary repairs. The equipment required for remodeling is greatly reduced as compared with. In particular, since most of these devices are connected to each other by piping, reusing these devices in their entirety greatly reduces piping work. Piping work of a cooling device usually involves processing of a building (for example, perforating a wall or the like), so that construction management is troublesome. Therefore, a reduction in the amount of plumbing work is very favorable for the builder, and furthermore, the construction period of the remodeling is shortened, so that the practical value is large.

According to a ninth aspect of the present invention, in addition to the constituent elements of the method of the seventh aspect, the condenser,
A radiator line through which a heat transfer medium flows, which is designed and manufactured separately from the evaporator and the fan coil unit, and has an operation history period substantially equal to the operation history period h of the engine and the engine-driven compressor; An air-cooling unit, which includes a radiator fan for bringing an air flow into contact with the outer peripheral surface of the radiator pipe and a motor for rotating the radiator fan, and functions as a condenser, is provided. Claim 9 described above.
According to the apparatus of the present invention, when the existing electric water cooling chiller type cooling apparatus is modified to constitute the engine driven cooling water circulation type cooling apparatus according to claim 7, the water cooling chiller type cooling apparatus to be modified is provided. The steam of the heat transfer medium can be cooled by the air cooling unit according to the ninth aspect of the present invention without continuously using the cooling tower, which is a large-sized outdoor device. A cooling function is obtained. When the cooling tower can be discarded, it means that the space occupied by the cooling tower can be used. Therefore, when implementing the invention of claim 7, an engine for driving the heat transfer medium vapor compression pump is required. The practical effect that the space required for installation can be provided is great. In other words, when the existing water-cooled chiller-type cooling device is modified to constitute the invention device according to claim 7, if there is not enough room outside the building where the existing water-cooled chiller-type cooling device is installed, the present invention is applied. This can be implemented only by applying claim 9. In addition, since the cooling tower circulates water while contacting the atmosphere, it must be managed so that microorganisms do not propagate in the water. In addition, as water evaporates upon contact with the atmosphere, the water level must be constantly monitored to replenish evaporation loss. In addition, oxygen and carbon dioxide dissolve into the water exposed to the atmosphere, which promotes corrosion of the inner peripheral surface of the pipeline. Since these circumstances overlap, the maintenance and management of the cooling tower requires a great deal of attention and labor. However, if the cooling tower is abolished by applying the present invention, these cumbersome maintenances are not required.

According to a tenth aspect of the present invention, in addition to the constituent features of the seventh to ninth aspects of the present invention, the evaporator is originally intended to vaporize an alternative chlorofluorocarbon (HCFC) liquid to cool chilled water. The condenser was originally designed and manufactured to cool alternative chlorofluorocarbon (HCFC) vapor with cooling water and liquefy it.
The engine-driven compression pump is designed and manufactured so as to inhale and compress and discharge a new substitute substance (HFC) vapor, and the above-described evaporator, engine-driven compression pump, and condenser are combined. A chlorofluorocarbon alternative (HC) is used as a heat transfer medium in a circulation pipe formed by connecting pipes sequentially.
FC) is enclosed. According to the apparatus of the tenth aspect described above, when the existing water-cooled chiller type cooling apparatus is modified to constitute the cooling apparatus according to the seventh aspect, the cooling apparatus is sealed in the circulation line of the refrigeration cycle working fluid. Since there is no need to change the “CFC classification” of the heat transfer medium, the alternative CFC (HCFC) used until the time of performing the above-mentioned remodeling can be continuously used without discarding. The fact that it is not necessary to change the chlorofluorocarbon type of the heat transfer medium is not only economically advantageous, but also advantageous for preventing pollution and effective for maintaining and exerting the cooling capacity. Hereinafter, the details will be sequentially described. At the time of carrying out the modification based on claim 7, when the alternative chlorofluorocarbon (HCFC) that has been used is discarded, a new heat transfer medium (for example, a new alternative substance (HFC)) is newly added. It must be purchased and injected. However, if the alternative CFC (HCFC) is used continuously, the replacement CFC (HCF)
Replenishment of the natural weight loss of C) is sufficient, and the cost of remodeling materials is reduced. In addition, although the chlorofluorocarbon alternative (HCFC) has a small ozone depletion potential but is not zero, it should not be indiscriminately released into the atmosphere, but rather be recovered and used as a specialized destruction plant (meaning to destroy the chemical structure). They must be brought in and disposed of. The fact that the classification of CFCs did not change at the time of the remodeling and that there was no need to dispose of the replacement CFCs (HCFC) enclosed in the existing water-cooled chiller-type cooling system,
Considering only the effect of reducing disposal costs, it has a large practical value. Changes in the physical properties of the heat transfer medium due to changes in the types of CFCs also have a significant effect. In other words, new substitute substances (HFC)
Generally has lower latent heat of vaporization and lighter specific gravity than alternative chlorofluorocarbon (HCFC). Therefore, the amount of heat transferred per unit flow rate (volume) is extremely small (decreases in proportion to the value of latent heat of evaporation × specific gravity). From such a viewpoint, when the existing water-cooled chiller type cooling device is modified by applying the present invention, it is easy to maintain the same level of cooling capacity as before the modification even after the modification.

[0021] The structure of the invention apparatus according to claim 11 is, in addition to the constituent elements of the invention apparatus of claims 7 to 9, that the evaporator originally cools chilled water by vaporizing an alternative chlorofluorocarbon (HCFC) liquid. The condenser was originally designed and manufactured to cool alternative chlorofluorocarbon (HCFC) vapor with cooling water and liquefy it.
The engine-driven compression pump is designed and manufactured so as to inhale and compress and discharge a new substitute substance (HFC) vapor, and the above-described evaporator, engine-driven compression pump, and condenser are combined. A new alternative substance (HF) is used as a heat transfer medium in a circulation pipe formed by connecting pipes in sequence.
C) is sealed, and the operating history period is "the operating history period h of the engine-driven compression pump and the engine" in the joint portion of the pipe member forming the circulation pipeline.
And a gasket and / or packing made of “a material that is chemically stable with respect to a new alternative substance (HFC)” is interposed to maintain the airtightness. A fluid that controls the flow rate of a new alternative substance (HFC), which is a heat transfer medium, in the middle of a heat transfer medium circulation system configured by connecting and connecting an evaporator, an engine-driven compression pump, and a condenser sequentially. The fluid control device is designed and manufactured to control the flow rate of the alternative chlorofluorocarbon (HCFC) liquid in connection with the design and manufacture of the evaporator and the fan coil unit. And has an operation history period substantially equal to the operation history period H of the evaporator, and is adjusted so that a larger amount of the new substitute substance (HFC) liquid can be circulated than the initial control flow rate value. Has been modified or readjusted by replacing some of its components, or the flow control fluid device has been mounted on the chilled water circulation type cooling device, and has been an engine driven compression pump. It has an operating history period h substantially equal to the above, and is characterized in that the flow rate of the new substitute substance (HFC) liquid is adjusted to be appropriate. According to the apparatus of the eleventh aspect described above, there is no concern about the chlorofluorocarbon pollution caused by the depletion of the ozone layer, and there is no fear that the supply of the heat transport medium will be subject to any legal regulations in the future. That is, when the existing water-cooled chiller-type cooling device is modified to constitute the cooling device according to claim 7, the present claim 11 is applied when the water-cooled chiller-type cooling device for the alternative chlorofluorocarbon (HCFC) is used as a base for the modification. When applied, the chilled water circulation type cooling device according to the present invention uses a new alternative substance (HFC) as a heat transfer medium, so even if the heat transfer medium is leaked into the atmosphere for some reason, the ozone layer is destroyed. There is no risk of causing CFC pollution. In addition, the production of this new substitute substance (HFC) is not subject to laws and regulations concerning pollution, and it is considered that it will not be subject to laws and regulations in the future. Therefore, there is no concern about replenishment of the heat transfer medium in the future. However, when the new alternative substance is simply injected without any special consideration, the small amount of the alternative fluorocarbon (HCFC) may remain and be mixed into the new alternative substance (HFC). Even if it is not considered, there is a problem of insufficient cooling capacity due to the latent heat of vaporization of the new substitute material (HFC) being smaller than the latent heat of vaporization of the alternative chlorofluorocarbon (HCFC). The corrosiveness of HFCs is greater than that of alternative chlorofluorocarbons (HCFCs), causing the problem of insufficient durability (leakage of the heat transfer medium). Therefore, the chilled water circulation type cooling device according to the present invention replaces or re-adjusts a fluid device (for example, an expansion valve) that regulates the flow rate of the heat transfer medium liquid in response to the change of the chlorofluorocarbon type. (Including a partial replacement of the HFC), the required flow rate of the new substitute material (HFC) as the heat transfer medium is secured, and the required cooling capacity can be exhibited. Furthermore, in the cooling water circulation type cooling device according to the present invention, the packing and gaskets are replaced with a material composed of a material which is chemically resistant to a new alternative substance (HFC), so that the sealing performance is improved. Also, the durability is excellent, and there is no possibility that a trouble such as leakage of the heat transfer medium is caused.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a cooling water circulation type cooling device according to an embodiment which is modified by applying the method of the present invention to an existing water-cooled chiller type cooling device. The flow direction is shown in a schematic piping system diagram. It is the figure which added the arrow which represents. This example is shown in FIG.
After remodeling the conventional water-cooled chiller type cooling device shown in
In the state where the operation period h has elapsed, the remodeling work has been performed when the operation period k has passed after the water-cooled chiller type cooling device of FIG. 3 was manufactured and installed. The total operation period H from the installation of the water-cooled chiller-type cooling device of FIG. 3 which is the base to be remodeled to the time shown in FIG. 1 is H = K + h.
In FIG. 1 (after the remodeling), the condenser 2, the cooling water pump driving motor 3, the cooling water pump 4, the cooling tower 5, the evaporator 7, the chilled water pump 8, The chilled water pump drive motor 9 and the fan / coil unit 10 were designed and manufactured as constituent components when the water-cooled chiller type cooling device, which is the parent body before the modification, was designed and manufactured. However, repairs and maintenance in the middle of the operating history and "replacement with equipment of the same specifications due to failure" shall not affect the calculation of the operating history period. The main point of the modification of the water-cooled chiller type cooling device shown in FIG. 3 during the operation history period K is that the package pump 1 is removed, and arrows a and b
Arrows a ', b "indicate pipes for circulating the heat transfer medium represented by
As shown in FIG. 1, an engine-driven compression pump 12 extends outside the room, and an extension portion of the engine-driven compression pump 12 is connected. The engine 11 is installed outside the room and connected to the engine-driven compression pump 12. The drive type compression pump 12 can be driven to rotate. The above-mentioned engine-driven compression pump is a compression pump whose pressure-rotational speed characteristics and other various characteristics are matched so that the engine can be rotationally driven, and which can constitute transmission means for rotationally driving. However, the compression pump is not necessarily required to be designed and manufactured to be driven by the engine.
The designer or remodeling engineer of the water-cooled chiller type cooling system
When various devices are appropriately selected from among a plurality of specifications, it is referred to in the present invention as "consecutively designed and manufactured" for convenience of explanation.

In performing the above-described remodeling with reference to FIG. 1, even when the alternative chlorofluorocarbon (HCFC) is used as the heat transfer medium of the water-cooled chiller type cooling apparatus before the modification, the alternative chlorofluorocarbon (HCFC) is used. It is difficult to obtain an engine-driven compression pump 12 for use in the market, and the engine-driven compression pump currently on the market is for a new alternative material (HFC). However, a new alternative substance (HF
It is possible to compress the alternative chlorofluorocarbon (HCFC) vapor by the compression pump for C). Here, an alternative CFC (HCF) is used as the heat transfer medium for the remodeled chilled water circulation type
It is necessary to select whether to use C) or a new substitute substance (HFC), and special attention must be paid to each type of chlorofluorocarbon. The following will be described sequentially. After the modification, it is relatively easy to use an alternative chlorofluorocarbon (HCFC), and the package-type compression pump 1a shown in FIG. 3 is enclosed in the heat transfer medium circulation system before being removed together with the electric motor 1b. The used alternative chlorofluorocarbon (HCFC) is collected and temporarily stored, and an engine driven compression pump 12 (FIG. 1) for a new alternative substance (HFC) is attached. The temporarily stored alternative CFC (HCFC) and the alternative CFC (HCFC) for natural weight loss replenishment are injected. In this case, a new substitute substance (HF
Care should be taken that the engine driven compression pump 12 for C) is not bordered by a new substitute (HFC). The reason for this is that the additive of alternative chlorofluorocarbon (HCFC) is a new alternative substance (H
This is because when they come into contact with (FC), they chemically react and change their quality. When using alternative chlorofluorocarbon (HCFC) as the heat transfer medium for the chilled water circulation type cooling system after remodeling, a new alternative substance (HF
When selecting the engine driven compression pump 12 for C),
Ignoring the cooling capacity values shown in the catalog figures, the basic performance (discharge pressure,
Discharge amount). The reason is that different types of chlorofluorocarbons have different latent heats of vaporization and thus have different cooling capacities.

When a new substitute substance (HFC) is used as the heat transfer medium of the chilled water circulation type cooling device after the modification, the following four points are noted. That is, (1) Since the new substitute substance (HFC) is highly corrosive to synthetic rubber, the joint portion provided in the heat transfer medium circulation pipe is disassembled and the sealing material, that is, the packing and the gasket are replaced with “ It is made of a material that is chemically stable against the new substitute substance (HFC). " (2) Clean the inside of the heat transfer medium circulation line in parallel with the above disassembly and replacement assembly so as to prevent the remaining CFCs (HCFC) from remaining and being mixed into the new replacement material (HFC). dry. (3) Engine-driven compression with the required pump performance to achieve the same cooling capacity as before the modification by using a new alternative substance (HFC) having a lower latent heat of vaporization and specific gravity than alternative chlorofluorocarbon (HCFC) The pump 12 is selected.

(4) The control flow rate of the expansion valve 6 is increased in accordance with the required pump performance. This increase in flow rate may involve re-adjusting the same expansion valve, replacing some of the expansion valve components, or replacing the expansion valve assembly. Further, the expansion valve after replacement is in a broad sense, and may be, for example, an orifice. In short, any fluid device having a function of controlling the flow rate may be used.

FIG. 2 is a schematic piping diagram showing a cooling water circulation type cooling device according to an embodiment different from FIG. 1 described above. The embodiment of FIG. 2 can be configured by modifying the conventional water-cooled chiller type cooling device shown in FIG. 3, but the water-cooled chiller type cooling device of FIG.
It can also be configured with further modification. Hereinafter, the different point (that is, the point where the above “further modification” is performed) will be described with reference to FIGS. 1 and 2. The condenser 2 is removed from the embodiment shown in FIG. 1, and the inlet In of the heat transfer medium and the outlet Out are directly connected to each other. Accordingly, the cooling tower 5 and the cooling water pump 4, which are large outdoor units, are separated from the water-cooled chiller-type cooling device. An air cooling unit 13 that substitutes the function of the condenser 2 is installed as an outdoor unit as follows. The air cooling unit 13 includes a radiator coil 13a as a conduit through which a heat transfer medium flows, a radiator fan 13b that blows air to an outer peripheral portion (including heat transfer fins) of the radiator coil 13a, and a fan driving motor 1
3c. The radiator coil 13a
In the portion where the heat transfer medium circulation pipe extends outside the room, specifically, the engine-driven compression pump 12 and the expansion valve 6
And is interposed between them. Cooling tower 5 (Fig. 1,
Since the air-cooling unit 13 is much smaller than that of FIG. 3), it is convenient for creating an outdoor space for installing the engine 11. In addition, since the cooling tower 5 is not used, maintenance man-hours for managing the quality and amount of cooling water are reduced, and troubles related to corrosion of the cooling water pipeline are eliminated. When the modification described above with reference to FIG. 2 is performed in the same manner as the modification described with reference to FIG.
The evaporator 7 and the fan coil unit 10, which are the main indoor equipment, have an operation history period H in the embodiment shown in FIG. The air cooling unit 13 has an operation history period h (where h <H).

[0027]

As described above, according to the embodiment of the present invention, the structure and operation of the present invention are clarified. According to the method of the first aspect of the present invention, the heat installed in the water-cooled chiller type cooling device to be remodeled is provided. Since the transport medium compression pump is removed together with the drive motor thereof and replaced with an engine-driven compression pump, it has become practically possible for the first time to replace the electric motor with an engine. Just looking at the piping system diagram of the refrigeration cycle connected to the components in an abstract view requires extra creativity to replace the electric motor that composes the electrically driven water-cooled chiller type cooling system with the engine. Although the illusion is easy to avoid, the heat transfer medium vapor compression pump of the existing water-cooled chiller type cooling device and the electric motor for driving it are integrally sealed inside the can, and only the electric motor for driving is replaced with the engine I can't do that. In the method according to the first aspect of the present invention, the combination of the “heat transfer medium vapor compression pump and the electric motor for driving the heat transfer medium vapor compression pump”, which constitute the existing water-cooled chiller type cooling device, is removed, and the “engine driven type” is removed. By installing the combination of the compression pump and the engine driven compression pump driving engine, actual remodeling work becomes possible. Furthermore, since the electric motor for driving the compression pump in the water-cooled chiller type cooling device before the modification is installed as an indoor unit, it cannot be simply replaced with an engine. According to the configuration of the present invention corresponding to the conditions of the apparatus to be remodeled, a part of the heat transfer medium circulation pipe extends outside the room, and an engine-driven compression pump is connected to the extension to drive the heat transfer medium circulation pipe. Engine can be installed outdoors. As a result, the water-cooled chiller-type cooling device is driven by the engine, and the supply of electric power is made unnecessary or greatly reduced.
The power savings met the public demand for power leveling. In addition, since the energy source of the water-cooled chiller-type cooling device is converted from electric power to fuel (any one of liquid fuel and gaseous fuel can be used or mixed), the energy cost is reduced, and the water-cooled chiller-type cooling device is further reduced. Running costs are reduced. Further, as a secondary effect, since the capacity of the power receiving equipment allocated to the power consumption of the water-cooled chiller-type cooling device can be margined, it is possible to generate power for OA of office work.

According to the method of the second aspect of the present invention, the cooling tower as the main outdoor equipment of the existing water-cooled chiller type cooling device, and the cooling water circulation connecting the cooling tower and the condenser as the indoor equipment. When removing these devices because the pipes and the cooling water pumps and their driving motors interposed and connected in the circulation pipes are effectively and continuously used without being discarded or stopped. Therefore, the required man-hours and necessary equipment costs for the construction are reduced, and the industrial waste generated by the construction is reduced, which can be in the public interest. This cooling tower and its attachments were originally designed as equipment for supplying cooling water for a water-cooled chiller type cooling system before remodeling, with its capacity and characteristics matched to the condenser, evaporator and fan / coil unit. Since it is manufactured, by applying the present invention, it is necessary and sufficient to maintain the cooling capacity of the water-cooled chiller type cooling apparatus before the modification even after the modification. In other words, when the water-cooled chiller-type cooling device is modified by applying the present invention 2, the main indoor equipment (condenser, evaporator, fan / coil unit) before the modification is “heat-conveying medium vapor compression”. It is sufficient to match the capacity and characteristics of the "pump and its driving engine". For the system that supplies cooling water to the condenser, no special consideration is needed for the capacity and characteristics, and it is sufficient to perform the necessary repairs. . The method of claim 2 is
This is suitable when there is ample room for installing an engine outdoors.

According to the third aspect of the present invention, an air cooling unit, which is a smaller device, is installed instead of the cooling tower, which is an outdoor device of the existing water-cooled chiller type cooling device, so that the space for installing the outdoor unit is provided. You can afford a lot. Therefore, an engine for driving the compression pump can be arranged in the extra space. As a basic configuration of a series of inventions according to the present application, in order to switch a compression pump drive source for vapor compression of a heat transfer medium of an existing water-cooled chiller type cooling device from an electric motor (indoor equipment) to an engine (outdoor equipment), An outdoor space is required to implement these inventions. In recent building circumstances, the margin of the outdoor space is not always sufficient, and there are many cases where the implementation of the remodeling is restricted due to unexpectedness of the engine installation space. In such a case, the practical value of the present invention in which the space occupied by the installation of the cooling tower can be diverted as the space for installing the engine is very large. Since the cooling tower circulates water by contacting it with the atmosphere, there is a danger that microorganisms will propagate, dust will be mixed in, or will be reduced by evaporation. An air-cooling unit equipped with a pipeline does not use cooling water and circulates and flows water so that it does not come into contact with the atmosphere. Easy. In addition, since the circulating fluid does not come into contact with atmospheric oxygen or carbon dioxide, these oxidizing gases do not dissolve into the fluid, and there is no risk of accelerating corrosion of the circulating conduit of the fluid.

According to the method of the present invention, an electric drive type water cooling system designed and manufactured in a time when a new alternative material (HFC) has not been widely used and using an alternative chlorofluorocarbon (HCFC) as a heat transfer medium. When the present invention is applied to a chiller-type cooling device to convert it to an engine drive system, a compression pump for a new alternative material (HFC), which has been relatively recently developed and has become a mainstay of current market products, is used. In addition, it is easy to obtain a heat transfer medium vapor compression pump, which is a replenishing device necessary for the remodeling, and the supply of replacement parts of the heat transfer medium vapor compression pump after the remodeling is guaranteed, so that maintenance is excellent. Furthermore, compression pumps for new alternative materials (HFCs) and their driving engines are relatively recent products, and it is easy to obtain a "combination of compression pump and driving engine" with performance characteristics matched to each other. .
In addition, the existing water-cooled chiller-type air conditioner originally designed and manufactured for HCFC is replaced with an engine and converted to an engine. HCFC) is enclosed and operated, so the operating characteristics of the condenser and evaporator that are continuously used after modification in the components of the existing water-cooled chiller type cooling device maintain good matching with the heat transfer medium even after modification. Thus, the respective functions are exhibited, and there is no danger of causing a cooling capacity shortage due to the mismatching or inducing trouble such as overheating due to the mismatching, and the operation reliability is high. In particular, it is not necessary to change the specifications of the expansion valve or to significantly modify the adjustment state of the operation characteristics of the expansion valve, and the test operation and adjustment after the modification are easy.

According to the fifth aspect of the present invention, it is necessary to replace the heat-pumping medium vapor compression pump when the electric drive type water-cooled chiller type cooling apparatus is modified to the engine drive type. Therefore, the replacement pump for HCFC is replaced with a new replacement material (HFC), and the heat transfer medium is also replaced with the new replacement material (HFC). Even if it leaks into the interior, there is no risk of causing chlorofluorocarbon pollution that destroys the ozone layer.
Furthermore, as explained in the section of [Problems to be Solved by the Invention], it is expected that the legal regulations on alternative chlorofluorocarbons (HCFCs) will become more and more strict over the years. By switching the heat transfer medium of the water-cooled chiller type cooling system, which is the equipment to be remodeled, to a completely pollution-free alternative substance (HFC) at this opportunity,
Supply can be expected without worry about obtaining the heat transport medium as a replenishing material. However, a new alternative substance (HF
Since C) has different physical and chemical properties as compared with the alternative chlorofluorocarbon (HCFC), careless replacement should not be performed. Specifically, the latent heat of vaporization is small (for example, about 0.
76 times), and the specific gravity (reciprocal of the saturated steam specific volume) is small (for example, about 0.72 times), that is, the cooling capacity equivalent to that before the remodeling cannot be maintained unless a large flow rate of the heat transfer medium is circulated and flowed. And both (H
FC and HCFC) must not be mixed, and
Although there is a problem that corrosion will occur unless it is a synthetic rubber for a new substitute material (HFC), the configuration of claim 5 strictly prevents the residual chlorofluorocarbon (HCFC) from remaining,
In addition, since the seal material, that is, gaskets and packings, are replaced with those for a new substitute material (HFC), the advantages of changing the type of the heat transfer medium (HCFC → HFC) are enjoyed, and further, the harmful effects are completely prevented practically. can do.

According to the invention method of claim 6, when replacing the chlorofluorocarbon alternative (HCFC) with the new alternative material (HFC), the latent heat of vapor of the new alternative material (HFC) is smaller than the latent heat of vaporization of the alternative chlorofluorocarbon (HCFC). And the specific gravity (reciprocal of the saturated vapor specific volume) of the new alternative substance (HFC) is corrected to cancel that it is smaller than the specific gravity of the alternative chlorofluorocarbon (HCFC). The cooling capacity can be maintained after the modification. Each of the alternative chlorofluorocarbon (HCFC) and the new alternative substance (HFC) is not a single compound but contains various types of fluorocarbons. Alternative CFCs (HCFC) include, for example, CFC R2
2, Freon R123 and Freon R225, which have different physical properties from each other. Further, the new substitute material (HFC) includes Freon 134a, Freon R32, Freon 125, and the like, and has different physical properties from each other. However, as long as a comparative study is made within the range of a generally supplied heat transfer medium, the alternative CFC (H
The new alternative substance (HFC), which has the largest (latent heat of vapor x specific gravity), has a higher latent heat of vaporization per unit volume than the CFC).
Is remarkably small (the refrigerant capacity is simply inferior). Therefore, the cooling capacity of the water-cooled chiller-type cooling device before the remodeling can be reduced unless the circulation flow rate is changed only by switching the type of the heat transfer medium from the alternative flon (HCFC) to the new substitute material (HFC) with the remodeling. After remodeling, it cannot be maintained. From this point of view, in the method of the present invention, the control flow rate value of the expansion valve that regulates the circulation flow rate of the heat transfer medium is increased so as to correct a decrease in cooling capacity due to a change in the type of chlorofluorocarbon.
The cooling capacity of the water-cooled chiller type cooling device before the modification can be maintained even after the modification.

According to the invention of claim 7, a water-cooled chiller type cooling device having an operating history (in other words, existing used equipment) of the existing electric drive system is used as a base, and the electric drive system device is replaced with the electric drive system device. By installing the engine drive equipment, the existing electric drive type water-cooled chiller type cooling device can be easily and inexpensively, and furthermore, the generation of industrial waste can be suppressed, and the new engine drive type cold water A circulation type cooling device can be configured. The cooling device according to claim 7 uses the engine as a main drive source. That is, a liquid fuel or a gas fuel is used as an energy source. Therefore, the unit cost of energy is low and the running cost is low as compared with a water-cooled chiller type cooling device using electric power as an energy source. In addition, liquid fuel or gaseous fuel is used as the main power source, and even if a small amount of power is consumed for auxiliary equipment, the power consumption does not significantly go against power load leveling. It is practically necessary to remove the electric motor leaving the electric drive type heat transfer medium vapor compression pump that constitutes the existing water-cooled chiller type cooling device, and to install an engine that drives the heat transfer medium vapor compression pump under actual conditions. (It is difficult to divide the heat pumping medium vapor compression pump and the driving electric motor.) Since the "engine" is newly installed and configured as a set of components, the above-described difficulties can be solved.

According to the invention of claim 8, when the existing water-cooled chiller type cooling device is modified to constitute the cooling water circulation type cooling device according to claim 7, the components of the water-cooled chiller type cooling device to be modified are included. Most of the outdoor units and some of the indoor units used as the above can be effectively used to reduce the cost of equipment for remodeling and significantly reduce the amount of industrial waste generated. That is, a condenser, a cooling tower that supplies cooling water to the condenser, a cooling water circulation line that connects the cooling tower and the condenser, and a cooling water pump that circulates and flows the cooling water in the cooling water circulation line. When replacing the above devices with other devices without replacing the motor for driving the cooling water pump, it can be reused as it is at the time of the remodeling work or after performing necessary repairs. The equipment required for remodeling is greatly reduced as compared with. In particular, since most of these devices are connected to each other by piping, reusing these devices in their entirety greatly reduces piping work. Piping work of a cooling device usually involves processing of a building (for example, perforating a wall or the like), so that construction management is troublesome. Therefore, the reduction of the amount of plumbing work is very favorable for the installer, and moreover,
Since the construction period for remodeling is also shortened, the practical value is large.

According to the ninth aspect of the present invention, when the existing electric water cooling chiller type cooling apparatus is modified to constitute the engine driven cold water circulation type cooling apparatus according to the seventh aspect,
The steam of the heat transfer medium can be cooled by the air cooling unit according to the ninth aspect, without continuously using the cooling tower, which is a large outdoor device, provided in the water-cooled chiller type cooling device to be remodeled. Therefore, a desired cooling function can be obtained even if the cooling tower is discarded. Since being able to dispose of the cooling tower means that the space occupied by the cooling tower can be used,
In the case of carrying out the invention of claim 7, there is a great practical effect that a space required for installing an engine for driving the heat transfer medium vapor compression pump can be provided. That is,
When the existing water-cooled chiller-type cooling device is modified to constitute the invention device according to claim 7, if there is not enough room outside the building where the existing water-cooled chiller-type cooling device is installed, the present invention is applied. 9 can be realized only by applying. In addition, since the cooling tower circulates water while contacting the atmosphere, it must be managed so that microorganisms do not propagate in the water. In addition, as water evaporates upon contact with the atmosphere, the water level must be constantly monitored to replenish evaporation loss. In addition, oxygen and carbon dioxide dissolve into the water exposed to the atmosphere, which promotes corrosion of the inner peripheral surface of the pipeline. Since these circumstances overlap, the maintenance and management of the cooling tower requires a great deal of attention and labor. However, if the cooling tower is abolished by applying the present invention, these cumbersome maintenances are not required.

According to the tenth aspect of the present invention, when the existing water-cooled chiller type cooling apparatus is modified to constitute the cooling apparatus according to the seventh aspect, the heat sealed in the circulation line of the working fluid of the refrigeration cycle. Since there is no need to change the “CFC classification” of the transport medium, the alternative CFC (HCFC) used until the time of the above-mentioned remodeling can be continuously used without discarding. The fact that it is not necessary to change the chlorofluorocarbon type of the heat transfer medium is not only economically advantageous, but also advantageous for preventing pollution and effective for maintaining and exerting the cooling capacity. Hereinafter, the details will be sequentially described. At the time of carrying out the modification based on claim 7, when the used alternative chlorofluorocarbon (HCFC) is discarded, a new heat transfer medium (for example, a new alternative substance (HFC)) is used.
Must be purchased and injected, but an alternative Freon (H
If CFCs are continuously used, it is sufficient to supply the natural weight loss of the alternative chlorofluorocarbon (HCFC) with the remodeling work, thereby reducing the cost of remodeling materials. Furthermore, alternative Freon (HCF)
C) has a small ozone depletion potential but it is not zero, so it should not be indiscriminately released into the atmosphere, but it should be collected, transported to a specialized destruction factory (meaning to destroy the chemical structure) and disposed of. There must be. At the time of the remodeling, the classification of CFCs did not change, and there was no need to dispose of the alternative CFCs (HCFC) enclosed in the existing water-cooled chiller type cooling system. Is big. Changes in the physical properties of the heat transfer medium due to changes in the types of CFCs also have a significant effect. That is, the new substitute material (HFC) generally has a lower latent heat of vaporization and a lower specific gravity than the substitute chlorofluorocarbon (HCFC). Therefore, the unit flow rate (volume)
The amount of heat transferred per unit is extremely small (decreases in proportion to the value of latent heat of evaporation × specific gravity). From such a viewpoint, claim 1 of the present invention
If the existing water-cooled chiller-type cooling device is modified by applying 0, it is easy to maintain the same cooling capacity as before the modification even after the modification.

According to the eleventh aspect of the present invention, there is no concern about the chlorofluorocarbon pollution caused by the depletion of the ozone layer, and there is no possibility that the supply of the heat transfer medium will be subject to laws and regulations in the future. That is, when the existing water-cooled chiller-type cooling device is modified to constitute the cooling device according to claim 7, the present claim 11 is applied when the water-cooled chiller-type cooling device for the alternative chlorofluorocarbon (HCFC) is used as a base for the modification. When applied, the chilled water circulation type cooling device according to the present invention uses a new alternative substance (HFC) as a heat transfer medium, so even if the heat transfer medium is leaked into the atmosphere for some reason, the ozone layer is destroyed. There is no risk of causing CFC pollution. In addition, the production of this new substitute substance (HFC) is not subject to laws and regulations concerning pollution, and it is considered that it will not be subject to laws and regulations in the future. Therefore, there is no concern about replenishment of the heat transfer medium in the future. However, when the new substitute is simply injected without any special consideration, the small amount of the substitute fluorocarbon (HCFC) may remain and be mixed into the new substitute (HFC). Even if it is not considered, there is a problem of insufficient cooling capacity due to the latent heat of vaporization of the new substitute material (HFC) being smaller than the latent heat of vaporization of the alternative chlorofluorocarbon (HCFC). HFC) is corrosive, but alternative CFC (HCFC)
Insufficient durability (leakage of the heat transfer medium) due to greater than the corrosiveness of the steel. Therefore, the chilled water circulation type cooling device according to the present invention replaces or re-adjusts a fluid device (for example, an expansion valve) that regulates the flow rate of the heat transfer medium liquid in accordance with the change of the chlorofluorocarbon type. (Including partial replacement of H 2), a new alternative substance (H
Since the required flow rate of FC) is secured, required cooling capacity can be exhibited. Furthermore, in the cooling water circulation type cooling device according to the present invention, the packing and gaskets are replaced with a material composed of a material which is chemically resistant to a new alternative substance (HFC), so that the sealing performance is improved. Also, the durability is excellent, and there is no possibility that a trouble such as leakage of the heat transfer medium is caused.

[Brief description of the drawings]

FIG. 1 is a diagram showing a chilled water circulation type cooling device according to an embodiment modified by applying the present invention to an existing water-cooled chiller type cooling device, and is a diagram in which arrows indicating flow directions are added to a schematic piping system diagram. .

FIG. 2 is a schematic piping system diagram showing a cooling water circulation type cooling device in an embodiment different from FIG. 1 described above.

FIG. 3 is a schematic system diagram showing a conventional example of a water-cooled chiller type cooling device of an electric motor drive system, in which arrows indicating the circulation flow direction of the heat transfer medium, arrows indicating the circulation flow of the cold water,
FIG. 3 is an explanatory view of a structure and a function in which an arrow indicating a circulation flow direction of cooling water is entered.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Package pump in the conventional water-cooled chiller type cooling device, 1a ... Compression pump which compresses the vapor of a heat transfer medium, 1b ... Electric motor for driving a pump, 2 ... Condenser, 3
... Cooling water pump drive motor, 4 ... Cooling water pump, 5 ... Cooling tower, 6 ... Expansion valve, 7 ... Evaporator, 8 ... Cool water pump, 9 ... Cool water pump drive motor, 10 ... Fan coil unit, 11 ... Engine 12: an engine-driven compression pump that is performance-matched to the engine; 13: an air-cooling unit that functions as a condenser; 13a
... radiator coil, 13b ... radiator fan, 13
c: Fan drive motor.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kenji Machizawa 1-9-1 Kida Yotodai, Tsuchiura-shi, Ibaraki Hitachi Building Facilities Engineering Co., Ltd. (72) Inventor Joe Higo, Yoda Kida, Tsuchiura-shi, Ibaraki 1-9-1 Higashidai Hitachi Building Facility Engineering Co., Ltd. (72) Inventor Keiji Tachibana Hitachi Building Facility Engineering Co., Ltd. 1 Kanda Izumicho, Chiyoda-ku, Tokyo

Claims (11)

[Claims] 1. A compression pump for sucking steam from a heat transfer medium and compressing and projecting the electric pump, an electric motor coupled to the compression pump for driving the rotation thereof, and a steam for the heat transfer medium compressed by the compression pump. A condenser that cools and liquefies, a cooling water pump and a cooling water pump drive motor that circulates cooling water through the condenser, a cooling tower that air-cools the circulated cooling water, and liquefaction by the condenser. An expansion valve for controlling the flow rate of the heat transfer medium liquid,
An evaporator that evaporates the heat transfer medium liquid that has passed through the expansion valve to cool the chilled water, a chilled water pump and a chilled water pump drive motor that circulates the chilled water through the evaporator, and receives the circulated supply of the chilled water to cool the indoor air. A method of converting a drive unit of an electric drive type water-cooled chiller type cooling device including a fan coil unit for cooling to convert a main drive energy source from electric power to a liquid or gaseous fuel, comprising: Remove the compression pump for sucking, compressing and discharging the vapor of the medium, and the electric motor for driving the rotation of the compression pump, and perform piping work at the location where the compression pump was connected in the circulation pipe of the heat transfer medium. A part of the heat transfer medium circulation pipe extends outside the room, an engine is installed outside the room, and an engine driven compression pump is mounted on the engine. Then, while connecting the compression pump to the “extending portion of the heat transfer medium circulation pipe”, the evaporator, the chilled water pump, the chilled water pump driving motor, and the fan / coil unit for cooling the indoor air are connected. A water-cooled chiller type cooling device characterized by being used almost as it is or after repairing a worn-out portion, without changing the installation position of these devices and the piping position of the chilled water circulation pipeline largely. How to remodel. 2. A cooling tower for air-cooling the cooling water, a pipe for circulating the cooling water between the cooling tower and the condenser, and cooling connected to the cooling water circulation pipe. The water pump and the cooling water pump drive motor are continuously used without changing the installation position of these devices as they are, or after repairing a worn portion, without significantly changing the installation position of these devices. A method for modifying the described water-cooled chiller type cooling device. 3. A cooling tower for cooling the cooling water by air, a pipe for circulating the cooling water between the cooling tower and the condenser, and a cooling pipe inserted and connected in the cooling water circulation pipe. A water pump and the cooling water pump drive motor are removed, a radiator pipe for flowing a heat transfer medium, a radiator fan for bringing air into contact with the outer peripheral surface of the radiator pipe, and a fan drive for rotating and driving the radiator fan. An air-cooling unit comprising a motor and functioning as a condenser '' is installed outside the room instead of the cooling tower, and an inflow end of the radiator pipe is connected to a discharge port of the engine-driven compression pump. And connecting the outflow end of the radiator line to the evaporator directly or via an expansion valve in series, The method for remodeling a water-cooled chiller-type cooling device according to claim 1, wherein the heat transfer medium vapor discharged from the engine-driven compressor is circulated and flown to the radiator pipe. 4. A compression pump for sucking and discharging steam of the heat transfer medium when the heat transfer medium sealed in the circulation line of the water-cooled chiller type cooling device to be remodeled is an alternative chlorofluorocarbon (HCFC). Prior to removal, the alternative chlorofluorocarbon (HCFC) previously sealed in the circulation system of the heat transfer medium is recovered and temporarily stored, and a new alternative substance (H) is used as the engine-driven compression pump.
FC) A new compression pump that is designed and manufactured to suck and compress and discharge steam, but has not yet come into contact with the new substitute material (HFC), or a new substitute material (HFC) vapor as described above. A compression pump designed and manufactured to be sucked and compressed and discharged, having a history of contact with the new substitute material (HFC), using the compression pump having the new substitute material (HFC) washed and removed, and Regarding the capacity of the compression pump, regardless of the value of its nominal cooling capacity, an engine-driven compression pump that has substantially the same discharge flow rate as the water-cooled chiller-type cooling device to be remodeled, After being connected to the extension part of the circulation path of the heat transfer medium circulation medium, the "temporarily stored alternative CFC (HCFC)" and the required alternative CFC for replenishment are provided in the circulation path. Wherein the sealing by injecting HCFC), remodeling method of the water-cooled chiller type air conditioning apparatus according to any of the claims 1 to 3. 5. A heat transfer medium sealed in a circulation line of a water-cooled chiller type cooling device to be remodeled is replaced with an alternative Freon (H).
In the case of CFC), after removing the compression pump that sucks and compresses and discharges the alternative Freon (HCFC) vapor from the water-cooled chiller-type cooling device that is the object of the above modification, the pipes that constitute the circulation system of the heat transfer medium Disassemble the joint part of the road member and remove all of the seal members used in the joint part or the seal member with insufficient chemical resistance with respect to the new substitute material (HFC), and conform to the new substitute material (HFC) Before and / or after the connection of the above-mentioned joints, the replacement Freon (HCFC) used up to that point is washed and removed, and then vacuum-dried and replaced. An engine-driven compression pump designed and manufactured to inhale, compress and discharge new substitute substance (HFC) vapors by removing almost completely chlorofluorocarbons (HCFCs) The capacity of the drive-type compression pump is a compression pump having substantially the same nominal cooling capacity as that of the water-cooled chiller-type cooling device to be remodeled, or has substantially the same nominal cooling capacity as described above. A compression pump configured to be suitable for a cooling device, wherein the engine-driven compression pump is connected to an outdoor extension of a circulation line of a heat transfer medium, and then a new substitute substance (HFC) is provided in the circulation line. Characterized by injecting and sealing
A method for remodeling a water-cooled chiller-type cooling device according to any one of claims 1 to 3. 6. An expansion valve inserted and connected in a heat transfer medium circulation pipe of a water-cooled chiller type cooling device to be remodeled,
Replace with an expansion valve or orifice with a large control flow rate,
Alternatively, an additional expansion valve or orifice different from the above may be additionally connected in parallel to the expansion valve that was inserted, or readjusted to increase the control flow rate, or replaced by replacing components. Claims: A new substitute material (HFC) having a flow rate capable of exhibiting substantially the same cooling capacity as that provided by the circulating flow of chlorofluorocarbon (HCFC) can be circulated. Item 6. A method for modifying a water-cooled chiller type cooling device according to Item 5. 7. An evaporator having a history period H which has been operated as a component of the water-cooled chiller type cooling device after being designed and manufactured, and designed and manufactured in connection with the evaporator, and has almost the same operation as the evaporator. A fan for cooling indoor air having a history period H
A coil unit and a chilled water pump and a chilled water pump drive motor which are designed and manufactured in connection with the evaporator and the fan / coil unit and have an operating history period H substantially equivalent to those of these devices are installed as indoor units. In addition, the evaporator, the fan / coil unit, and the chilled water pump are connected in a ring shape, and a chilled water circulation pipe having an operation history period H substantially equivalent to those of these devices is piped indoors, and An engine-driven compression pump that is designed and manufactured separately from the evaporator and the fan / coil unit and has an operation history period h shorter than the operation history period H of these devices; and the evaporator and the fan / coil unit. The engine-driven compression pump is designed and manufactured separately, and is mounted on the engine-driven compression pump to drive and rotate the engine-driven compression pump. An engine having an operating history period h substantially equal to that of the pump is installed as an outdoor unit, and the circulation line which is annularly connected including the engine-driven compression pump, the evaporator, and the condenser includes: "Compression →
A chilled water circulation type cooling device characterized by forming a refrigeration cycle of “condensation → decompression → evaporation”. 8. A cooling tower, which is designed and manufactured in connection with the evaporator and the fan / coil unit, and has an operation history period H substantially similar to those of the equipment, is installed as an indoor unit. A cooling water pipe member that is designed and manufactured in connection with a condenser, connects these devices to form a circulation system of cooling water, and is designed and manufactured in connection with the cooling tower and the condenser. A cooling water pump interposed and connected to the cooling water circulation system, and a cooling water pump driving motor connected to the cooling water pump. The chilled water circulation type cooling device according to claim 7, characterized in that: 9. A heat exchanger designed and manufactured separately from the condenser, the evaporator, and the fan / coil unit, and having an operation history period substantially equal to the operation history period h of the engine and the engine-driven compressor. A radiator pipe that circulates the conveying medium, a radiator fan that makes the air flow contact the outer peripheral surface of the radiator pipe, and a motor that rotationally drives the radiator fan, an air cooling unit that functions as a condenser is installed. The chilled water circulation type cooling device according to claim 7, wherein: 10. The evaporator is essentially an alternative chlorofluorocarbon (H
The condenser is designed and manufactured to vaporize CFC) liquid to cool the cold water, and the condenser is designed and manufactured to cool the alternative chlorofluorocarbon (HCFC) vapor by cooling water and liquefy it. And the engine-driven compression pump is designed and manufactured to suck in and discharge a new substitute substance (HFC) vapor, wherein the evaporator, the engine-driven compression pump, 10. An alternative chlorofluorocarbon (HCFC) as a heat transfer medium is enclosed in a circulation pipe formed by connecting and connecting a vessel and a vessel in sequence. The cooling device of the cold water circulation type described in 1. 11. The said evaporator is originally an alternative Freon (H
The condenser is designed and manufactured to vaporize liquid (CFC) and cool the chilled water, and the condenser is originally designed to cool and liquefy alternative Freon (HCFC) vapor by cooling water. And the engine-driven compression pump is designed and manufactured to suck in and discharge a new substitute substance (HFC) vapor, wherein the evaporator, the engine-driven compression pump, A new alternative substance (HFC) is enclosed as a heat transfer medium in a circulation pipe formed by sequentially connecting and connecting a vessel and a pipe. Has an operation history period substantially equal to the “operation history period h of the engine-driven compression pump and the engine”,
"Materials chemically stable against new substitute substances (HFCs)"
A gasket and / or gasket is interposed to maintain airtightness, and the evaporator, the engine-driven compression pump, and the condenser are sequentially connected and connected. In the middle of the heat transfer medium circulation system, a new alternative substance (HF
C) a fluid device for controlling the flow rate is interposed and connected. The fluid device for controlling the flow rate is linked to the design and manufacture of the evaporator and the fan coil unit, and the flow rate of the alternative chlorofluorocarbon (HCFC) liquid is connected. Which has an operation history period substantially equal to the operation history period H of the evaporator, and has a larger amount of new substitute material (HFC) liquid than the initial control flow rate value. Has been adjusted so that it can be distributed, or has been readjusted by replacing some of the components, or the flow rate control fluid device is mounted on the cooling water circulation type cooling device. Since then, it has an operating history period h substantially equal to that of the engine-driven compression pump, and is adjusted so as to make the flow rate of the new substitute substance (HFC) liquid appropriate. Item 9 Cold water circulation type cooling device according to any one of the inner.