JPH0325057Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a water draining device for a low water flow type air conditioner.

BACKGROUND ART Conventionally, this type of low water flow type air conditioner has a configuration as shown in FIG. That is, a suction port 2 is provided below the main body 1, and an air outlet 3 is formed above the main body 1, and the main body 1 is provided with an air blower 4 and a heat exchanger 5 through which hot and cold water flows. The heat exchanger 5 is a so-called low water flow type, which is made up of thin pipes and configured into a single circuit to increase the flow rate and produce a predetermined capacity.The medium (cold and hot water) flows in from the inlet socket 6 indicated by arrow A. Then, it flows back and forth through a straight pipe (not shown), flows through U-bend 7, and then flows through U-bends 8-9.
-10 and upward in a meandering manner, it first flows through the C row circuit, then flows through the U bend 11-12-13 and the D row circuit, then flows through the U bend 14-15-16 and the E row circuit, and then flows into the outlet socket 17. The water flows to the heat source side (not shown) as indicated by arrow B, and is configured as a low-flow type heat exchanger 5 in a so-called series circuit.
In addition, the inlet socket 6 is provided with a first drain plug 18 made of brass to drain water from the C-row circuit, and a metal first drain plug 18 made of the same brass to drain water from the D-row circuit and E-row circuit. 2 A drain plug 19 is provided at the U-bend 13 located at the lowest position to drain water from each pipe and drain it into a drain pan 20 in preparation for freezing in winter.

Problems to be Solved by the Invention In such a conventional configuration, there is a first water drain valve 18 on the inlet socket 6 side for draining water from the C line circuit, and a D
A second drain plug 19 and two drain plugs are required to drain water from the row circuit and the E row circuit, and the water must be drained from two locations, which is disadvantageous in terms of cost.

This invention solves these problems,
To easily drain water and to obtain a low-cost water draining device.

Means for Solving the Problem In order to solve this problem, the present invention provides a heat exchanger arranged in multiple rows, configured in a meandering manner using U-bends, and formed in a series circuit. A pipe located at the lowest end of the exchanger is provided with an inlet socket, a communicating pipe is provided between the main body of the inlet socket and a U-bend at the lowest end connecting each of the plurality of rows, and the inlet A drain plug is provided in the main body of the socket in a drainage channel communicating with the pipe of the inlet socket and the communication pipe.

With this configuration, when draining the water inside the heat exchanger, by removing the water drain plug from the inlet socket body, the water in the array of pipes that communicate with the inlet socket and the water in the array of pipes that communicate with each other are transferred to the communicating pipes. The water will be drained through the inlet socket body.

Embodiment An embodiment of the present invention is shown below in Figs. 1 and 2.
This will be explained based on the diagram. A main body 23 of a low water flow type air conditioner (such as a fan coil unit) has an inlet 24 at the bottom and an outlet 2 at the top.
5. Inside the main body 23, a blower 26 is provided, and above the blower 26, a heat exchanger 27 configured as the low water flow type and through which cold and hot water flows is provided in an inclined manner. In this heat exchanger 27, a medium flows from an arrow A into an inlet socket 28, flows through a pipe (straight pipe) 29 (Fig. 2), reciprocates on the opposite side, flows through a U-bend 30, and continues upward in a meandering manner. It flows through U-bends 31-32-33 and the C-row circuit, then flows downward through U-bends 34-35-36 in the middle row circuit, then moves to the E-row circuit and flows through U-bends 37-38-39. Finally, exit socket 4
0 to the heat source side (not shown) as shown by arrow B. i.e. inlet socket 28
form a series circuit leading to the outlet socket 40,
It produces a specified capacity with a low amount of water. A communication tube 42 made of a thin tube is provided between the main body 41 of the inlet socket 28 and the U-bend 36 at the lowermost end connecting the D-row circuit and the E-row circuit. As shown in FIG. 2, the main body 41 of the inlet socket 28, which is made of a brass alloy, has an inlet channel (dotted arrow) 43 that communicates with the pipe 29, and a communicating pipe for draining water in preparation for freezing. Drainage channel 4 communicating with 42
4 is provided on the side, and the drainage channel 46 of the drain plug 45
is connected to. The drain plug 45 is screwed and locked from below by a tapered threaded portion 47. In addition,
An air vent plug 48 is provided in the outlet socket 40 to vent air from above.

In the above configuration, normally when hot and cold water flows in from the inlet socket 28 in the direction of arrow A, it first flows to the U-bend 30 of the C-row circuit, and then to the U-bend 31-32-
33 and flow moves to D row circuit, U bend 34-35
-36 and E row circuit, U bend 37-38-
39 and flows upward, and flows out from the outlet socket 40 toward the heat source side as indicated by arrow B. Until the operation is stopped, if the heat exchanger 27 is made up of thin tubes configured in a series circuit in the vertical direction as described above, and there is a risk that the water in the tubes 29 will freeze in the winter, the water in the tubes 29 It is necessary to remove the drain plug 45 to prevent damage to the pipe due to freezing.
By removing this water drain plug 45, the water in the C line circuit is drained downward from the drain channel 46 as indicated by the solid arrow F from the pipe 29 shown in FIG. On the other hand, the D-row circuit and the E-row circuit are connected through the U-bend 36 at the bottom end.
Furthermore, since the communication pipe 42 communicates with the water drain passage 44 of the inlet socket 28, the water in the D row circuit and the E row circuit falls into the water drainage passage 44 via the communication pipe 42, and then flows from the drainage passage 46 to the drain pan 49. All the water in the series circuit and multiple rows of pipes 29 is drained.

Effects of the Invention As is clear from the description of the above embodiments, the present invention includes heat exchangers arranged in a plurality of rows to form a series circuit, and an inlet socket in a tube located at the lowest end of the heat exchanger. , a communication pipe is provided between the main body of the inlet socket and a U-bend at the lowest end connecting each of the plurality of rows, and the main body of the inlet socket communicates with the pipe of the inlet socket and the communication pipe. Since we have installed a drain valve to remove the water from the heat exchanger, all you have to do to drain the water in case of freezing is to remove one drain valve, and all the water in the heat exchanger can be drained. A drain valve made of brass (brass) has the advantage of being low in cost because it can be used with just one tap.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a water draining device of an air conditioner according to an embodiment of the present invention, Fig. 2 is a sectional view of an inlet socket of the water draining device of the same air conditioner, and Fig. 3 is a sectional view of a water draining device of a conventional air conditioner. FIG. 2 is a cross-sectional view of the device. 27... Heat exchanger, 28... Inlet socket, 2
9...Pipe, 30-39...U bend, 41...Main body of inlet socket, 42...Communication pipe, 45...Drain plug, 46...Drain channel.

Claims (1)

[Scope of utility model registration request] A heat exchanger arranged in a plurality of rows and configured in a meandering manner by U-bends and formed in a series circuit, and an inlet socket in a tube located at the lowest end of the heat exchanger, the inlet socket and the U at the lowest end connecting the plurality of rows to each other.
A water draining device for an air conditioner, wherein a communicating pipe is provided between the inlet socket and the bend, and a drain plug is provided in the main body of the inlet socket and a drain passage communicating with the inlet socket pipe and the communicating pipe.