JP2603708B2 - Air conditioning system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to cooling and heating by flowing a cooling refrigerant or a heating refrigerant through a heat exchanger of an individual air conditioner installed in each room of each floor in a building or the like. The present invention relates to an air conditioning system configured to perform any of the above.

<Conventional technology> A conventional air conditioning system of this type includes a cooling heat exchanger and a heating heat exchanger in an individual air conditioner installed in each room on each floor, and a cooling heat exchanger. On the other hand, a cooling unit including a cooling condenser and a compressor is connected to each other through a cooling refrigerant pipe, and on the other hand, to a heating heat exchanger,
A cooling unit is connected to a heating unit having a heating evaporator and a compressor through a heating refrigerant pipe, and the cooling refrigerant is forcibly circulated and flowed through the cooling condenser and the cooling heat exchanger. And the heating operation is performed by forcibly circulating and flowing the heating refrigerant over the heating evaporator and the heating heat exchanger.

However, in a cooling operation with a high load, in order to force the cooling refrigerant to flow through a large number of heat exchangers, a compressor having an extremely high capacity is required as a compressor. There was a drawback that the cost increased and it became uneconomical.

Therefore, a condenser for cooling is installed in the tower such as the roof of the building, and an evaporator for heating is installed in the basement of the building, etc., and the cooling condenser, cooling refrigerant piping and cooling heat exchanger are installed. The cooling refrigerant, on the other hand, is configured so that the heating refrigerant flows in a sealed state over the heating evaporator and the heating refrigerant pipe and the heating heat exchanger, respectively.As the cooling refrigerant, the cooling heat exchanger is used. In addition to using a refrigerant that changes phase from liquid to vapor due to heat exchange between the cooling condenser and the cooling heat exchanger, the refrigerant that has changed phase to liquid is transferred to the cooling heat exchanger. With a sufficient head difference, on the other hand, as a heating refrigerant, a refrigerant that changes phase from vapor to liquid with heat exchange in the heating heat exchanger is used, and a heating evaporator and a heating heat exchanger are used. In the meantime, the refrigerant changed phase to liquid A head difference sufficient to transfer to the heating evaporator, both also of the cooling refrigerant and the refrigerant for heating, the system was configured to circulate fluid in naturally have been developed.

<Problems to be solved by the invention> However, according to the configuration of the above-described developed conventional example, a large space for installing a heating evaporator must be secured in a basement of a building or the like, and a parking lot is required. There was a disadvantage that the space of the underground space used for various facilities such as stores and stores was narrowed.

In addition, in the conventional example described above, and in each of the developed conventional examples, dedicated heat exchangers and refrigerant pipes are required for cooling and heating, respectively, and a large number of heat exchangers and refrigerant pipes are provided. In addition, a space for passing the refrigerant pipes must be secured, and the initial cost is increased.

The first air-conditioning system according to the present invention has been made in view of such circumstances, and can perform both cooling and heating while reducing power costs as much as possible and using a heat exchanger. And reducing the number of refrigerant pipes to reduce the initial cost, and to expand the available space of the underground space, and the second air conditioning system according to the present invention has a heat source It is an object of the present invention to minimize the installation space of the device and to facilitate the design.

<Means for Solving the Problems> A first air conditioning system according to the present invention stores an ice maker that manufactures ice and ice obtained by the ice maker in order to achieve the above object. A heat storage tank and a cooling condenser for cooling and condensing and liquefying the refrigerant are provided at locations close to each other, and the ice making machine and the heat storage tank, and the heat storage tank and the cooling condenser are each connected, The cooling condenser and the heat exchanger of the individual air conditioner provided on each floor are connected to each other through a refrigerant pipe, and the refrigerant pipe is connected to the cooling exchanger in parallel with the cooling condenser. A heating unit having a heating evaporator and a compressor is connected through a connection pipe so as to communicate with each other, and the cooling condenser, the heat exchanger, the refrigerant pipe, the heating evaporator, and the Sealed with compressor and connecting pipe A configuration in which the refrigerant circulates and flows in the state, and a switching mechanism that switches between a cooling operation mode in which the refrigerant flows through the cooling condenser and a heating operation mode in which the refrigerant flows through the heating evaporator, and Using a refrigerant that changes phase from liquid to vapor with heat exchange in the heat exchanger in the cooling operation mode, and between the cooling condenser and the heat exchanger, the phase changed to liquid. It has a head difference enough to transfer the refrigerant to the heat exchanger.

In order to achieve the above object, the second air conditioning system according to the present invention has a configuration in which a cooling condenser and a heating unit are installed in the same space as the configuration of the first air conditioning system. Add.

<Operation> According to the configuration of the first air conditioning system according to the present invention, by switching the switching mechanism, the cooling refrigerant is naturally spread over the cooling condenser and the heat exchanger provided in each of the individual air conditioners. A circulating cooling operation mode,
The heating refrigerant, the evaporator for heating, and the same heat exchanger as in the cooling operation mode, a connection pipe, and a heating operation mode in which the refrigerant is forcibly circulated through the same refrigerant pipe portion as in the cooling operation mode to obtain a heating operation mode. Desired operation of cooling and heating can be performed.

Further, according to the configuration of the second air conditioning system according to the present invention, the cooling condenser and the heating unit are installed in the same space such as a tower room on a rooftop of a building or a machine room installed on the top floor of a building. can do.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

The drawing is an overall system configuration diagram showing an embodiment of the air conditioning system according to the present invention.

In these figures, A is a heat source installed on the roof of a building B, and includes an ice maker 1 for producing fine ice and a heat storage tank 2 for supplying and storing fine ice obtained by the ice maker 1. It is composed of

A cooling condenser 3 is installed in the machine room on the roof of the building B, and the cooling condenser 3 and the heat storage tank 2 are connected to each other via a circulation pump 4 to cool the cold water stored in the heat storage tank 2. It is configured to circulate and supply to the use condenser 3.

On the other hand, an individual air conditioner 7 including a blower fan 5 and a heat exchanger 6 is provided in each room of each floor F ... of the building B.

The cooling condenser 3 and the heat exchangers 6 are connected to each other via a refrigerant pipe 10 having headers 9 and 9 interposed therebetween, and the cooling condenser 3 and the heat exchanger 6 are connected to each other. 6 ...
And a refrigerant that changes phase from liquid to vapor due to heat exchange in the heat exchanger 6 and changes phase from vapor to liquid by condensation in the cooling condenser 3 in a sealed state. I have.

The liquid receiver 8 is installed at a position higher than each of the heat exchangers 6... The refrigerant phase-changed from vapor to liquid by condensation in the cooling condenser 3 is supplied to the heat exchanger 6 while flowing down. There is provided a head difference sufficient for the refrigerant phase-changed from liquid to vapor with heat exchange in the heat exchanger 6 to rise and return to the cooling condenser 3. In the cooling operation mode, the difference between the vapor and the liquid is provided. By the phase change, the refrigerant naturally circulates and flows between the cooling condenser 3 and the heat exchanger 6.

As the refrigerant, Freon gas R-22 is used. This has the advantage that it contains hydrogen and chlorine and decomposes in the troposphere, so that there is no danger of destroying the ozone layer.

At the inlets of the refrigerant pipes 10 to the heat exchangers 6..., There are provided a flow control valve 11 for adjusting a refrigerant liquid inflow amount and an opening / closing valve 12 for preventing the refrigerant liquid inflow. The flow control valve 11 and the opening / closing valve 12 operate only in the cooling operation mode.

A heating unit 17 including a liquid receiver 13, an accumulator 14, a compressor 15, and a heating evaporator 16 is installed in the machine room on the roof of the building B where the cooling condenser 3 is installed.

A heating unit located at a position higher than the rooftop floor and below the liquid receiver 8 connected to the cooling condenser 3 and a position reaching the refrigerant gas inlet to the cooling condenser 3; 17 is connected through a connection pipe 18 and an electromagnetically operated three-way valve 19 so as to communicate in parallel with the cooling condenser 3, and by switching the three-way valves 19, 19, the refrigerant is condensed for cooling. The air conditioner 3 can be switched between a cooling operation mode in which the circulation is performed by natural circulation and a heating operation mode in which the heating evaporator 16 is forcedly circulated.

The configuration for switching between the cooling operation mode and the heating operation mode in this way is not limited to the three-way valves 19 and 19, for example,
Various configurations can be adopted, such as a configuration in which an on-off valve is combined to switch by a reciprocal opening and closing operation, and these are collectively referred to as a switching mechanism.

In the above embodiment, the cooling condenser 3 and the heating unit 17 are installed in the machine room which is the same space on the roof of the building B, but they may be provided in different places. Further, for example, the cooling condenser 3 and the heating unit 17 may be configured as an integrated unit to further simplify the configuration and facilitate design and installation.

Further, in the above embodiment, an auxiliary pump for pumping the refrigerant liquid is interposed, for example, in the middle of the refrigerant pipe 10 through which the refrigerant liquid flows, and only in the heating operation mode, the refrigerant liquid is supplied to the receiver by the auxiliary pump. The pump 15 may be configured to be pumped, assist the pumping of the refrigerant liquid by the compressor 15, and use a compressor 15 having a relatively small capacity.

<Effect of the Invention> According to the first air conditioning system of the present invention, the cooling operation with a higher load is performed by circulating the refrigerant naturally, while the heating operation is forced by the compressor. Since it adopts a configuration of performing by circulating and flowing, a compressor having a relatively small capacity can be used as a compressor adapted only to a low-load heating operation. Since the heat exchanger can be used for both cooling and heating, the number of refrigerant pipes and heat exchangers can be reduced as compared with the conventional example,
The space through which the refrigerant pipe passes can be reduced, and the initial cost can be reduced.

In addition, to obtain a cooling refrigerant, cold water using ice produced in an ice machine and stored in a heat storage tank is supplied to a cooling condenser. Therefore, as in the case of using a cooling water system in district heating and cooling, a cooling heat source is used. This eliminates the need to install a long large-diameter pipe to the cooling condenser, which is more effective in reducing the initial cost. In addition, since natural circulation is used for cooling operation with a high load, the total power consumption of cooling and heating can be reduced rationally, and running costs can be reduced sufficiently.

Furthermore, since a heating unit with a heating evaporator can be installed at any location, there is no need to secure a space for installing a heating evaporator in the basement of a building, etc., and the underground space is fully utilized for various facilities. It is economical.

According to the second air conditioning system of the present invention, since the cooling condenser and the heating unit are installed in the same space, a dedicated machine room or the like is designed for each, and the rooftop of the building is required. The tower can be concentrated on the top floor of a building or other building, and the space on the other floors can be used for other purposes, making it easy to design and economical.

[Brief description of the drawings]

The drawing is an overall system configuration diagram showing an embodiment of the air conditioning system according to the present invention. 1 ... ice machine 2 ... heat storage tank 3 ... cooling condenser 6 ... heat exchanger 7 ... individual air conditioner 10 ... refrigerant pipe 15 ... compressor 16 ... heating evaporator 17 ... Heating unit 18 Connection pipe 19 Three-way valve as switching mechanism F Each floor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshitaka Sasaki, Inventor 4-27, Honcho, Higashi-ku, Osaka-shi, Osaka Inside the Osaka head office of Takenaka Corporation (72) Inventor Osamu Sugiura 4-27, Honcho, Higashi-ku, Osaka, Osaka Takenaka Corporation (Osaka Head Office) (56) References Japanese Utility Model Showa 50-101051 (JP, U)

Claims (2)

(57) [Claims] An ice maker for producing ice, a heat storage tank for storing ice obtained by the ice maker, and a cooling condenser for cooling and condensing and liquefying a refrigerant are provided near each other. And the heat storage tank, and the heat storage tank and the cooling condenser are connected to each other, and the cooling condenser and the heat exchangers of the individual air conditioners provided on each floor are connected through a refrigerant pipe. A heating unit including a heating evaporator and a compressor is connected to the refrigerant pipe via a connection pipe so as to communicate with the heat exchanger in parallel with the cooling condenser. The cooling condenser, the heat exchanger, the refrigerant pipe, the heating evaporator, the compressor and the connection pipe are configured to circulate and flow the refrigerant in a sealed state, and the refrigerant is used for the cooling. Cooling operation flowing to the condenser And a switching mechanism for switching between a heating operation mode and a heating operation mode for flowing through the heating evaporator, and as the refrigerant, undergoes a phase change from liquid to vapor with heat exchange in the heat exchanger in the cooling operation mode. An air conditioning system using a refrigerant and having a head difference between the cooling condenser and the heat exchanger sufficient to transfer the refrigerant, which has changed into a liquid, to the heat exchanger. . 2. The air conditioning system according to claim 1, wherein the cooling condenser and the heating unit are installed in the same space.