JPS5818136Y2 - Air conditioning equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the improvement of air-conditioning equipment, and one of its purposes is particularly to improve heating efficiency.

Conventionally, in this type of air conditioning system, a cold air layer was formed on the floor side and a warm air layer was formed on the ceiling side due to the difference in specific gravity of the hot air blown out, especially on the indoor side during heating operation. .

As a result, the heat from the head and feet, which is desirable for so-called heating, is the opposite, resulting in an unsatisfactory heating effect.Furthermore, with floor heating only, heating is achieved by natural convection, and cold air flows downward from the window due to cold draft from the window side. It had the disadvantage of being cold.

The present invention eliminates the drawbacks found in the conventional heating and cooling systems mentioned above.

Hereinafter, the present invention will be described with reference to the accompanying drawings showing one embodiment thereof.

In the figure, reference numeral 1 denotes a compressor, and a four-way valve 2 is provided on the discharge side and the suction side to switch the direction of flow of refrigerant.

3 is an outdoor heat exchanger connected to the four-way valve 2 at one end, and a check valve 6 connected in parallel to the series circuit of capillary tubes 4 and 5 constituting a pressure reducer and the capillary tube 4 at the other end. is provided.

Reference numeral 8 designates an auxiliary heat exchanger, and an inlet side valve device 7 consisting of a three-way valve is connected to the inlet end, and an outlet side valve device 9 consisting of a four-way valve is connected to the outlet end.

This auxiliary heat exchanger 8 has an inlet end connected to the capillary tube 5 via the inlet side valve device 7, and an outlet end connected to the four-way valve 2 via the outlet side valve device 9. The refrigerant discharged from the compressor 1 returns to the compressor 1, forming a heat pump type refrigeration cycle.

The circulating flow of the refrigerant will be described later.

Reference numeral 10 denotes a fan provided in the auxiliary heat exchanger 8, which is driven by a motor 11.

This fan 10 sends air cooled or heated by the auxiliary heat exchanger 8 into the room.

A heat exchanger 12 has one end connected to the outlet side valve device 9 and the other end connected between the inlet side valve device 7 and the auxiliary heat exchanger 8, and is installed on the floor 14, and its surroundings is covered with a heat insulating material 13.

16 is the auxiliary heat exchanger 8 and the fan 10° motor 1
1, the air outlet 17 opens at the bottom of the window 18, and the width B of the air outlet 17 is equal to the width A of the window 18.
It is set slightly wider than the

In the above configuration, when performing cooling operation, the four-way valve 2.
The outlet side valve device 9 and the inlet side valve device 7 are switched by an air conditioning/heating switch or the like (not shown) so that the refrigerant flows as shown by the dotted line arrows in FIG. 1, respectively.

Therefore, the refrigerant discharged from the compressor 1 is transferred to the four-way valve 2.
．． Outdoor heat exchanger 3. Check valve 6, capillary tube 5. Inlet side valve device7. Auxiliary heat exchanger8. Outlet side valve device 9
．． Four-way valve 2. It flows in the order of compressor 1.

The refrigerant passing through the outdoor heat exchanger 3 is cooled by an outdoor fan (not shown), and the air cooled by the auxiliary heat exchanger 8 is blown indoors by a fan 10 to cool the room.

Next, when performing heating operation, turn the four-way valve 2. The outlet side valve device 9 and the inlet side valve device 7 are switched to each serve as a heating circuit.

Therefore, the refrigerant is discharged from the compressor 1 as shown by the solid arrow, and the refrigerant is discharged from the four-way valve 2. Outlet side valve device 9° heat exchanger 12. Auxiliary heat exchanger8. Outlet side valve device9. Inlet side valve device7. Capillary tube5. Capilano tube 4. Outdoor heat exchanger 3. Four-way valve 2. It flows in the order of compressor 1.

The heat exchanger 12 sequentially heats the air from the floor 14 side to heat the room, and at the same time the auxiliary heat exchanger 8 prevents cold draft from the window as shown by arrow 15 in FIG.

In addition, since the indoor unit 16 is set to a width B that can sufficiently cover the width A of the window, the wind blown out from the air outlet 17 acts like an air curtain to prevent drafts flowing in from the window glass. It is blown out while spreading.

Therefore, it is possible to perform heating to keep the head cold and feet warm, which is desirable as so-called heating, resulting in efficient heating.

Furthermore, the rotation speed of the motor 11 that drives the fan of the indoor unit 16 during heating is changed by pressure detection using a pressure switch (not shown) or the like that senses the gas pressure at the outlet of the auxiliary heat exchanger 8. If controlled, it is also possible to prevent the gas pressure from becoming high.

Furthermore, when the heating starts, a timer can be installed to set the fan 10 at a high rotation speed for a certain period of time to increase the air volume and raise the room temperature.

During normal operation at this time, the rotational speed is low enough to prevent cold draft, and the air volume is kept small.

As is clear from the above embodiments, the air conditioning system of the present invention has a heat pump type refrigeration cycle by connecting a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducer, and an auxiliary heat exchanger in a ring, An auxiliary heat exchanger is provided under a window in the room, and an inlet side valve device and an outlet side valve device are respectively provided on both sides of the inlet and outlet of the auxiliary heat exchanger to control the flow of refrigerant to the auxiliary heat exchanger, Further, one end of a heat exchanger disposed on the indoor floor is connected between the inlet of the auxiliary heat exchanger and the inlet side valve device, and the other end is connected to an outlet side valve provided on the outlet side of the auxiliary heat exchanger. connected to the device, and controlled by each of the valve devices and the four-way valve to flow the high-pressure refrigerant from the four-way valve during heating in series from the floor heat exchanger to the auxiliary heat exchanger, and further to the pressure reducer; In particular, during heating, the heat exchanger installed on the floor can perform head-to-head heating, which is desirable as so-called heating, improving heating efficiency. This prevents the heating effect from decreasing due to cold air coming from the windows, and also provides an auxiliary heating effect in the room.Also, since high-pressure refrigerant flows from the heat exchanger installed on the floor to the auxiliary heat exchanger, high-pressure This has various advantages, such as being able to suppress abnormal pressure rises on the side as much as possible, suppressing overload conditions of the refrigeration cycle as much as possible, and improving heating capacity.

[Brief explanation of drawings]

Fig. 1 is a piping circuit diagram of an air conditioning system according to an embodiment of the present invention, Fig. 2 is a perspective view of the main parts of the room showing the installed state of a heat exchanger and an auxiliary heat exchanger in the air conditioning system, and Fig. 3
The figure is a vertical cross-sectional view of a room equipped with the heating and cooling device. 1... Compressor, 2... Four-way valve, 3...
... Outdoor heat exchanger, 4, 5 ... Capillary tube, 7 ... Inlet side valve device, 8 ...
... Auxiliary heat exchanger, 9 ... Outlet side valve device, 1
2...Heat exchanger.

Claims (1)

[Scope of utility model registration request] A compressor, a four-way valve, an outdoor heat exchanger, a pressure reducer, and an auxiliary heat exchanger are connected in a ring to form a heat pump type refrigeration cycle. An inlet-side valve device and an outlet-side valve device are installed on both sides of the inlet and outlet of the exchanger to control the flow of refrigerant to the auxiliary heat exchanger, and one end of the heat exchanger installed on the indoor floor is provided with an auxiliary valve device. The valve device is connected between the heat exchanger and the inlet side valve device, and the other end is connected to the outlet side valve device provided on the outlet side of the auxiliary heat exchanger, and the four-way valve device and the four-way valve are connected to each other during heating. A heating and cooling system that controls high-pressure refrigerant from a valve to flow in series from a floor heat exchanger to an auxiliary heat exchanger, and then to a pressure reducer.