JPH04366332A - Bottom base of outdoor heat exchanger - Google Patents

Abstract

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

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is based on the bottom base of an air conditioner, which is equipped with an on-off valve at the drain outlet for the purpose of preventing air from bypassing the drain outlet and reducing the amount of heat exchange during cycle operation. It is related to.

0002

[Prior Art] In the conventional air conditioner (Japanese Unexamined Patent Publication No. 1-306743), a hole for draining water is provided in the bottom base of the outdoor unit. The structure is such that water is discharged outside from the above-mentioned outlet.

0003

[Problems to be Solved by the Invention] In the above-mentioned prior art, during cycle operation, air flows in from the drain outlet in the bottom base, causing a slight air bypass. No consideration was given to the fact that this would reduce the amount of air passing through the heat exchanger, that is, the amount of heat exchanged.
There was a problem of reduced capacity. An object of the present invention is to provide a mechanism that prevents the capacity from decreasing during cycle operation without impairing the original effect as a drain port.

0004

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a drain port with an on-off valve so that the drain port is closed during cooling operation. Specific examples of valve structures include: ■ A valve that is fixed to the bottom base with a rotary joint and opens and closes depending on the pressure difference between the inside and outside of the outdoor unit cabinet; ■ A valve made of temperature-sensitive metal (bimetal, etc.) that changes its shape at a preset temperature. There are two types of valves that open and close depending on the temperature.

[0005]

[Operation] Regarding the above-mentioned means (2), by providing an on-off valve, air is prevented from flowing in through the drain port during cycle operation, thereby preventing a decrease in performance. Furthermore, if water accumulates in the drain port during heating operation, etc., the weight of the water opens the valve and discharges it to the outside of the machine, so there is no way to prevent water from being drained.

[0006] Regarding the above-mentioned means (2), the temperature of the on-off valve is set so that the drain port is closed during cooling operation and opened during heating operation by sensing the ambient temperature. During cooling, air is prevented from flowing in through the drain, preventing a drop in capacity, and during heating, the drain opens,
Drain water adhering to the outdoor heat exchanger is discharged outside the machine.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is a sectional view of an outdoor unit cabinet, showing the outline of the present invention. The cabinet has a bottom base 1
, a heat exchanger 5, and a front cover 6, and a blower is installed inside the cabinet, which sucks air from the back of the heat exchanger and blows it out from the outlet on the front cover to ensure the amount of air passing through the heat exchanger. do. The bottom base 1 is provided with a drain outlet, through which drain water is discharged to the outside of the cabinet machine. In the present invention, an on-off valve 2 is provided at the drain port portion, and is closed during cooling operation to prevent air from flowing in through the drain port, thereby suppressing a decrease in air passing through the heat exchanger. Further, during heating operation or when drainage such as rainwater is generated, the valve is opened by the weight of the drainage water, and drainage is carried out as appropriate.

FIG. 2 shows the structure of an outdoor unit cabinet. A blower 4, a heat exchanger 5, a compressor 7, etc. are arranged on the bottom base 1, and a service cover 8, a front cover 6,
It is covered with a rear cover 9, and an upper cover 10 is provided as a top plate.

FIG. 3 shows an example of the current shape of the bottom base, in which the drain outlet 3 is provided approximately in the center.

FIGS. 4 and 5 show specific examples of two types of on-off valves.

FIG. 4 shows an embodiment of an on-off valve having a rotary joint. On-off valve 2 attached to the drain port 3 part of the bottom base 1
It has a structure that can be freely opened and closed by a rotary joint 11. The operation will be explained below. When the blower is operating, the pressure inside the outdoor unit cabinet is lower than the pressure outside the cabinet. This differential pressure causes the valve to be attracted to the bottom base, and the drain port is blocked. Therefore, it is possible to prevent air from flowing in through the drain port, thereby suppressing a decrease in the amount of air passing through the heat exchanger. This can prevent a decrease in performance during cycle operation. When the blower is stopped, there is no pressure difference between the inside and outside of the cabinet, and the valve remains open, functioning as a normal drain port. If drain water from the outdoor heat exchanger collects at the drain port during heating operation, or if rainwater collects at the bottom base, the weight of the drain water will push the valve open and the drain water will flow out of the machine. It is discharged outside. Therefore, drain water is not stored in the bottom base, and rust prevention effects can also be obtained.

FIG. 5 shows an embodiment of an on-off valve using a temperature-sensitive metal such as bimetal as the material. The on-off valve 2 is made of a temperature-sensitive metal that has the characteristic of closing in a temperature range above a preset temperature and opening in a temperature range below that temperature. In this example, the temperature is set so that the air conditioner is closed during cooling operation.

The operation will be explained below. During cooling operation, the drain port is initially closed by a valve to prevent inflow from the drain port, and as described above with reference to FIG. 4, the effect of preventing a decrease in cooling operation performance is obtained. During heating operation, the outdoor air temperature becomes lower than the initial setting value, so the drain port is closed due to the deformation of the valve and functions as a normal drain port.

[0015]

According to the present invention, it is possible to prevent the amount of heat exchange of the outdoor unit from decreasing during cooling operation, and as a result, it is possible to obtain the effect of preventing a decrease in capacity.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the invention.

FIG. 2 is a diagram showing an example of the current outdoor unit structure.

FIG. 3 is a diagram showing an example of the current shape of the bottom base.

FIG. 4 is a diagram showing an example of an on-off valve having a rotary joint.

FIG. 5 is a diagram showing an example of an on-off valve made of a temperature-sensitive metal.

[Explanation of symbols]

1...Bottom base, 2...Opening/closing valve, 3...Drain drain port, 4...Blower, 5...Heat exchanger, 11...Rotary joint, 12...Drain drain.

Claims (2)

[Claims] Claim 1: In a heat pump type air conditioner outdoor unit having a drain outlet on the bottom base, a valve is fixed to the drain outlet part by a rotary joint and opens and closes based on the pressure difference between the inside and outside of the outdoor unit cabinet generated by the outdoor blower. A bottom base for an outdoor heat exchanger characterized by a structured structure. Claim 2: In a heat pump type air conditioner outdoor unit having a drain outlet on the bottom base, the drain outlet part is made of a temperature-sensitive metal that changes shape at a preset temperature, and opens and closes depending on the temperature. A bottom base for an outdoor heat exchanger characterized by having a valve structure.