JPS6137998Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention relates to a heat exchanger, and more specifically, a return bag type cold/hot water coil is installed in duplicate, and fluid switching control is performed on the fluid outflow side. Incorporate a valve,
The present invention relates to a heat exchanger in which the flow path can be controlled by switching the valve at the time of changing the load.

[Conventional technology]

Heat exchangers used in air conditioners, air heaters, etc. are composed of a return bag-type cold/hot water coil and fins attached around it. Generally, water or hot water that has gone around the coil via a valve is sent out through a drain or hot water valve connected to the other side of the coil.

[Problems that the invention attempts to solve] However, in such a configuration, when the heating and cooling load is large and when the heating and cooling load is small, two coils are used. The capacity of the heat exchanger, that is, the amount of hot water flowing into the coil, was adjusted by operating the water supply or hot water supply valve and drainage or hot water discharge valve that were provided. However, as the device becomes larger, the valve becomes larger, and its operation is not easy and requires many operating points, which is inconvenient.

[Purpose of invention]

This invention aims to eliminate the above-mentioned drawbacks of the prior art.

[Summary of the idea]

In order to achieve the above object, this invention consists of a plurality of coils for a heat exchanger including a small load coil and a large load coil, and one end of both coils is commonly connected to serve as a water supply or hot water supply inlet. The other end of the small load coil is commonly connected to the other end of the large load coil via a fluid switching control valve, and by switching the valve, the fluid resistance is reduced compared to all of the coils or the small load coil. To provide a heat exchanger capable of supplying water or hot water to a large coil for heavy loads.

[Example of idea]

Figure 1 shows the configuration of a heat exchanger implemented using the three-way valve of this invention, where 1 is a coil for large loads, and 2 is a coil for small loads that has a smaller fluid resistance than the coil 1 for large loads. One end of both coils is commonly connected with a pipe joint 3 of an appropriate configuration to form a common water supply or hot water supply port (hereinafter simply referred to as water supply port) 4 for both coils 1 and 2. . The other ends of both the coils 1 and 2 are connected to the coil 1 for heavy load via a pipe joint 5 to the first inlet 6a of the three-way valve 6, and the second end of the three-way valve 6 is Inflow port 6
A coil 2 for small loads is connected to b, and a drain or outlet (hereinafter simply referred to as a drain) 7 is connected to the outlet 6c of the three-way valve 6. still,
In the figure, structures such as fins that are not directly related to this invention are omitted. Further, the pipe joint 5 is configured such that the coil 1 for large loads is connected and opened to the first inlet 6a of the three-way valve 6, and the coil 2 for small loads is connected and opened to the second inlet 6b of the three-way valve 6. It is composed of

[Effect of invention]

In this heat exchanger, when the load is 100%, water or hot water entering from the water supply port 4 flows into both coils 1 and 2 from the pipe joint 3, but the three-way valve 6 is connected to the second coil as shown in Figure 2a. By closing the inlet 6b side, hot water or water passes only through the large load coil 1, and this coil 1 corresponds to the load. Also, if the load is 50%, the second
As shown in Figure b, by opening the first and second inlets 6a and 6b of the three-way valve 6, water and hot water flow mainly through the small-load coil 2 with low flow resistance, with only a portion of the coil being under load. corresponds to

[Effect of idea]

As mentioned above, this idea consists of a plurality of coils for a heat exchanger, one for small loads and one for large loads, and one end of both coils is connected in common to serve as a water supply or hot water inlet. The other end of the coil is commonly connected to the other end of the large-load coil through a fluid switching control valve, and by switching the valve, all of the coils or a large load with greater fluid resistance than the small-load coil can be connected. Since hot water or hot water can be supplied to the water supply coil or hot water supply coil, it is possible to flow hot water or water to all or part of the water supply or hot water supply coil, so a single set of coil units can respond to the load situation, making operation easier. Since there is only one location, it is easy and the structure is simple, so it has the advantage of being able to be constructed at a low cost.

[Brief explanation of drawings]

The figures show one embodiment of this invention. Figure 1 is a block diagram of the main parts of a heat exchanger implementing this invention, and Figures 2a and 2b show the open/closed states of the three-way valve. FIG. 1... Coil for large load, 2... Coil for small load, 3, 5... Pipe joint, 4... Water supply, hot water inlet, 6
...Three-way valve (fluid switching control valve), 7...Drainage,
Water outlet.

Claims (1)

[Scope of utility model registration request] The heat exchanger coil is composed of multiple coils for small loads and coils for large loads, one end of both coils is connected in common to serve as a water supply or hot water supply inlet, and the other end of the coil for small loads is used for fluid switching. It is commonly connected to the other end of the large-load coil through a control valve, and by switching the valve, water or hot water is supplied to all of the coils or to the large-load coil, which has a larger fluid resistance than the small-load coil. A heat exchanger characterized by: