JPS59150269A - Heat pump type floor heating apparatus - 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 Field of the Invention The present invention relates to a heat pump type floor heating device capable of heating and cooling a house, which has a floor heating function.

Conventional Structure and Problems The conventional system structure of this type of heat pump type floor heating apparatus is as shown in FIG. 1, with an outdoor unit v.

It consists of an indoor unit W and a floor radiator i.

The basic refrigeration cycle in the case of shared heating and cooling is the second
As shown in the figure, a compressor a, a four-way valve for switching between cooling and heating operation, a first three-way valve for connecting the indoor unit, a first connecting pipe d that connects the indoor unit C9 w, and the outdoor unit V. ,, the first connection part e for connecting the outside unit, the indoor heat exchanger f which becomes a compressor during heating and an evaporator during cooling, the connection part q of the heat dissipation row for the floor, the piping of the heat dissipation girder row for the floor. , a floor radiator i, a pipe j returning from the floor radiator, a heating check valve t that prevents refrigerant from flowing into the floor radiator l during cooling, and an outdoor unit at the connection part returning from the floor radiator. A second connecting part m for connection, a second connecting pipe n connecting the indoor unit (unit) w and the outdoor unit (unit) v, and a second three-way valve for connecting the indoor unit. A common air-conditioning/heating pressure reducing device P and an outdoor heat exchanger Q, which is an evaporator during heating and a condenser during cooling, are connected in series in an annular manner, and a check valve r for cooling that flows refrigerant to a floor radiator i during heating and a cooling check valve r for cooling are connected in series. A refrigeration cycle is constructed by connecting the series circuit of the pressure reducing device S in parallel to the series circuit of the floor radiator i and the heating check valve t. Furthermore, an indoor fan t is attached to the indoor heat exchanger f, and an outdoor blower U is attached to the outdoor heat exchanger Q. Here, the pipe diameter of the first connecting pipe d, the diameter of the first three-way valve C for connecting the indoor unit and the connecting part e, the diameter of the first connecting part e for connecting the outdoor unit are inches, and the diameter of the other pipes is ri, j2. Pipe diameter and connection part of second connection pipe n 'J v kp Second connection part m for outdoor unit connection
, the diameter of the second three-way valve 0 for connecting the indoor unit is 4 inches.

To explain the operation during heating operation, the refrigerant compressed into the high temperature section by the compressor a passes through the four-way valve S, passes through the first three-way valve C, and moves to the indoor unit w, where it is radiated sensible heat by the indoor heat exchanger f. It then enters the floor radiator i via the connection q, where it radiates latent heat and condenses. Then, it valves the connection part k again, returns to the indoor unit W, passes through the heating check valve t, and passes through the second connection part m for the outdoor unit connection and the second three-way valve 0 for the indoor unit connection. Outdoor unit) Return to v.

Then, it is depressurized by the cooling/heating common pressure reducing device p to a low temperature and low pressure, performs endothermic evaporation in the outdoor heat exchanger Q, passes through a four-way valve, and then returns to the compressor a.

To explain the operation during cooling operation, the refrigerant compressed to a high volume and high pressure by the compressor a passes through the four-way valve and enters the outdoor heat exchanger Q, where it undergoes heat dissipation and condensation, and is depressurized by the air conditioning/heating shared pressure reducing device p. The indoor unit is connected through the second three-way valve 0 for connecting the indoor unit and the second connecting part mi for connecting the outdoor unit)
to go into. Then, it passes through the cooling check valve r and the cooling pressure reducing device 8.
The pressure is further reduced to a low temperature and low pressure, and then endothermic evaporation is performed in the indoor heat exchanger f, and the air enters the outdoor unit v through the first connection e for connecting the outdoor unit and the first three-way valve C, and enters the outdoor unit v through the four-way valve. The operation is to return to the compressor ai/fi through the compressor ai/fi.

As described above, when a system is constructed using an indoor distribution method in which a distribution connection portion for a floor radiator is provided in an indoor unit, various problems occur as described below.

For example, consider the indoor distribution system when using a wall-mounted indoor unit (w). In general, wall-mounted indoor units are characterized by being thin and compact, so if they are used with floor heating, there is no space to connect the piping to the floor radiator i, making it very difficult to construct. This also made the exterior look worse, resulting in an indoor unit)
has the disadvantage that it is limited to floor-standing types.

In addition, because the diameter of the piping going to the floor radiator is as small as ζ inches, pressure loss due to resistance increases, and the pressure of the refrigerant flowing inside the piping drops, causing the temperature of the floor radiator i to drop by 9. Another drawback was that the heating power was reduced, causing discomfort to residents. This will be explained using an actual Mollier diagram shown in FIG.

In Figure 6, the solid line is a Mollier diagram of a conventional example in which the pipe diameter is 1 l/' and pressure loss occurs in the pipe leading to the floor radiator, and the dotted line is the characteristic of the condenser side when there is no pressure loss. ,
The dot-dashed line is a contour line. In the refrigeration cycle of a heat pump type floor heating system, the indoor heat exchanger and the floor radiator 1 are connected in series, so the refrigerant discharged from the compressor a is first transferred to the indoor heat exchanger f from point A to point A in Figure 6. Sensible heat is radiated up to B. Next, latent heat is further radiated and condensed in the floor radiator i. Let's compare the conventional example where there is pressure loss in the piping to the floor radiator and the case where there is no pressure loss. First, in the case of the conventional example with pressure loss, the pressure drops from point B to point D in the piping, and the pressure drop occurs from point B to point D in the piping, and the heat radiation in floor radiator i is on the solid line. From the point to the point F.

If there is no pressure loss, heat is radiated from point C to point E on the dotted line. Here, when the temperature at each point is compared using the contour line indicated by a dotted line, it can be seen that the conventional example with pressure loss is lower overall. As can be seen from the above, in the conventional example, the diameter of the piping leading to the floor radiator i is as small as 75-4 inches, which causes a pressure loss of the refrigerant in the piping, and as a result, the temperature of the floor radiator i increases. This will reduce the heating capacity and cause discomfort to the occupants.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, and aims to provide versatility so that the system can be configured with any indoor unit, and to enable more comfortable heating operation. .

Structure of the Invention In order to achieve this object, the present invention provides an outdoor unit with a connection section dedicated to the indoor unit and a connection section dedicated to the floor radiator, and connects the indoor heat exchanger and the floor radiator in series using connection auxiliary piping. This solves the conventional drawback of limiting the type of indoor unit when configuring the system, and furthermore, by making the diameter of the connection to the floor radiator larger than the diameter of the connection to the indoor unit, The diameter of the pipe going to the unit is made larger than the diameter of the pipe returning to the indoor unit to prevent pressure loss.

DESCRIPTION OF EMBODIMENTS The system configuration of an embodiment of the heat pump type floor heating apparatus of the present invention is as shown in FIG.
It consists of an indoor unit W and a floor radiator L. The basic refrigeration cycle in the case of shared heating and cooling is as shown in Figure 4: 1 degree compressor, 2 degrees four-way valve to switch between cooling and heating operation. 1st three-way valve for indoor unit exclusive connection 3. 4. A first connection pipe connecting the outdoor unit (7) v and the indoor unit (7) w.
First connection part for outdoor unit6. Indoor heat exchanger that functions as a condenser during heating and an evaporator during cooling 6. Second connection part for outdoor unit7. Second connection pipe connecting indoor unit W and outdoor unit v8. 2nd three-way valve for indoor unit exclusive connection9.
Connecting auxiliary piping 22 to form a series circuit between the indoor heat exchanger 6 and the floor radiator l; Three-way valve dedicated to the floor radiator 10. Piping for floor radiator 11. Floor radiator 1. Floor radiator return piping 13, floor radiator dedicated return three-way valve 14. Heating check valve that prevents refrigerant from flowing into the floor radiator i during cooling 16.
Air-conditioning/heating shared pressure reducing device 16. The outdoor heat exchanger 17, which serves as an evaporator during heating and a condenser during cooling, is connected in series in an annular manner, and a series circuit of a cooling check valve 18 that flows refrigerant to the floor radiator i during heating and a pressure reducing device 19 exclusively for cooling is formed. A refrigeration cycle is constructed by connecting the floor radiator i and the heating valve 16 in series circuit in parallel. Furthermore, an indoor blower 20 is attached to the indoor heat exchanger 6, and an outdoor blower is attached to the outdoor heat exchanger 17. 2
1 has been added. Here, the diameter of each connection part is 3 degrees for the first three-way valve for the indoor unit and the first three-way valve for the outdoor unit.
The connecting portion 6 and the three-way valve 1o dedicated to the floor radiator are each % inch, and the second connecting portion 7 for the outdoor unit. The indoor unit exclusive connection second three-way valve 9 and the floor radiator exclusive return three-way valve 14 are each \inch. Also, the first connection pipe 4. Second
Connection piping 8. Piping for floor radiator 11. Floor radiator return piping 13. The pipe diameter of the connection auxiliary pipe 22 is the first three-way valve 3 for the indoor unit to which it is connected, and the first connection part 6 for the outdoor unit. Outdoor unit, second connection part for throat 7. 2nd three-way valve for indoor unit exclusive connection9. Three-way valve for floor radiator only 10. Three-way return valve for floor radiator 14. is the same as the caliber of

To explain the operation during heating, the refrigerant compressed to high temperature and high pressure by the compressor 1 passes through the four-way valve 2, exits the outdoor unit V from the first three-way valve 3 exclusively connected to the indoor unit, and is transferred to the first connecting pipe 4.
and is sent to the indoor unit 7)w. The refrigerant sent to the indoor unit W passes through the first connection part 6 for the outdoor unit, enters the indoor heat exchanger 6, where it radiates sensible heat, and then passes through the second connection part 7 for the outdoor unit to the indoor unit heat exchanger 6. ) w, passes through the second connection pipe 8, and is returned to the -extrabirth room unit v. The refrigerant returned to the outdoor unit V enters the outdoor unit V from the second three-way valve 9 exclusively connected to the indoor unit, passes through the connection auxiliary piping 22, and passes through the three-way valve 10 exclusively destined for the floor radiator and the piping destined for the floor radiator. 11 and is sent to the floor radiator i. Here, the refrigerant further radiates latent heat and condenses. Then, it passes through the floor radiator return piping 13 and returns to the outside unit. The refrigerant returned to the outside unit)
It enters the outdoor unit V from the return three-way valve 14 for the floor radiator, passes through the heating check valve 15, and then enters the air conditioning/heating shared pressure reducing device 16.
It is depressurized, becomes low temperature and low pressure, undergoes endothermic evaporation in the outdoor heat exchanger 17, and returns to the compressor 1 through the four-way valve 2.

To explain the operation during cooling operation, the refrigerant is compressed to high temperature and high pressure by the compressor 1, passes through the four-way valve 2, radiates heat and condenses in the outdoor heat exchanger 17, is depressurized by the cooling/heating shared pressure reducing device 16, and is passed through the cooling check valve 18. The air is then further depressurized by the cooling-dedicated decompression device 19, resulting in low temperature and low pressure. Then, it exits the outdoor unit W from the second three-way valve 9 exclusively connected to the indoor unit, passes through the second connection pipe 8, and enters the indoor unit W through the second connection s7 for the outdoor unit.

The indoor heat exchanger 6 then performs endothermic evaporation, exits the indoor unit W from the first connection part 6 for the outdoor unit, passes through the first connection pipe 4, passes through the first three-way valve 3 exclusively connected to the indoor unit, and passes through the outdoor unit V. Return to

Then, it passes through the four-way valve 2 again and returns to the compressor 1.

As described above, the present invention is based on the amount of radiator for the floor and indoor unit.
9-150269 (4) Install the connection part of w) on the outdoor unit) v, set the distribution method to the outdoor distribution method, and change the diameter of the three-way valve 1o dedicated to the floor radiator of the outdoor unit V to the connection part dedicated to the indoor unit. The problems of the prior art are solved by making the diameter of the pipe larger than that of the two three-way valves 9 and making the pipe diameter of the pipe connected to both the same as that of the connecting part.

The explanation will be given below.

For example, consider the outdoor distribution system when a wall-mounted indoor unit w is used. In the present invention, the piping connection to the floor radiator i is provided in the outdoor unit (v), so the construction of the indoor unit (w) is carried out on the outdoor unit (v) in the same way as with a normal air conditioner.
All that is required is the connection piping work, and the system can be configured without any problems even with the wall-mounted type, which is thin and compact without compromising the appearance. Of course, the same can be said for floor-standing types and other types of indoor units (w).Regardless of the type of indoor units (l-w), a system can be configured with the same outdoor unit (v), which could not be achieved with the conventional indoor distribution method. The effect of versatility that could not have been achieved leaks out. Next, regarding the diameter of the connection part, in the embodiment of the present invention, the diameter of the three-way valve 1o dedicated to the floor radiator is % inches, and the diameter of the second three-way valve 90 dedicated to the indoor unit is 4 inches. . In other words, the pipe 11 going to the floor radiator is thicker than the second connecting pipe 8 which becomes the return pipe from the indoor unit W during heating. This effect will be explained below. As is clear from Fig. 4, the refrigeration cycle of the heat pump floor heating system consists of an indoor heat exchanger 6 and a floor radiator i.
are connected in series, the refrigerant discharged from the compressor 1 first radiates sensible heat in the indoor heat exchanger 16, and then radiates latent heat in the floor radiator i. In this case, pressure loss may occur depending on the thickness of the piping from the indoor heat exchanger 6 to the floor radiator l. Therefore, by making the diameter of the three-way valve 1o exclusively for the floor radiator larger than the diameter of the second three-way valve 9 exclusively connected to the indoor unit, the pipe 1 for the floor radiator
The diameter of the pipe 1 is also made larger than that of the second connection pipe 8, which is the return pipe from the indoor heat exchanger 6 during heating, to prevent pressure loss of the refrigerant. This result is shown in the Mollier diagram of Fig. 5. The refrigerant discharged from the compressor 1 radiates sensible heat in the indoor heat exchanger 6 from point A to point B in the figure, and is transferred to the floor without any pressure loss. Go to radiator i, where latent heat is radiated from point C to point E on the dotted line in the figure.

If you look at the temperature of the refrigerant flowing through the floor radiator i on the dotted line shown in C, you can see that it is higher than the two dotted points F on the solid line, which is the conventional example.

In other words, as a result, it is possible to provide a more comfortable feeling of heating to the occupants than by being able to prevent a decrease in the temperature of the entire floor radiator and a decrease in heating capacity as in the conventional case.

In addition, in this embodiment, since a three-way valve is used at each connection of the outdoor unit 1-v, the indoor unit W and the floor radiator i
air purge is also possible.

Effect of the invention The heat pump type floor heating device of the present invention uses a compressor.

It is equipped with an outdoor unit having an outdoor heat exchanger and a pressure reducing device, an indoor unit having an indoor heat exchanger, and a floor radiator. Uni 7) Dedicated connection second connection part, a dedicated connection part for the floor radiator that connects the piping to the floor radiator, and a floor radiator that connects the floor radiator return piping to the upstream side of the pressure reducing device. The indoor heat exchanger and the floor radiator were connected in series by attaching a dedicated return connection part to each of the above indoor unit 7) and connecting the second dedicated connection part and the radiator dedicated connection part with connection auxiliary piping. Something,
In addition to having the versatility of being able to configure the system regardless of the type of indoor unit, it also simplifies construction, and furthermore, the diameter of the connection section dedicated to the radiator can be changed to the size of the indoor unit, 7) dedicated connection. Since it is made larger than the diameter of the second connection part, it is possible to eliminate a decrease in temperature and heating capacity of the floor radiator, and it has the effect of being able to provide a comfortable feeling of heating to the occupants.

[Brief explanation of the drawing]

Fig. 1 is a system configuration diagram of a conventional heat pump type floor heating device, Fig. 2 is a refrigeration cycle diagram of the same system, Fig. 3 is a system configuration diagram of a heat pump type floor heating device according to an embodiment of the present invention, and Fig. 4 is a system configuration diagram of a conventional heat pump type floor heating device. The figure is a refrigeration cycle diagram of the system, and FIG. 6 is a Mollier diagram. 1... Compressor, snoring... Indoor unit exclusive connection first three-way valve (indoor unit exclusive connection first connection)
, 6... Indoor heat exchanger, 9... Indoor unit exclusive connection second three-way valve (indoor unit exclusive connection second
connection part), 1Q... Three-way valve for floor radiator only (connection part for floor radiator only), 13... Floor radiator return piping, 14...・Return three-way valve for floor radiator (return connection part for floor radiator), 16...
・Air conditioning/heating shared pressure reducing device (pressure reducing device), 17...
Outdoor heat converter, 20...Indoor blower, 22...
...Connection auxiliary piping, V...Outdoor unit,
W: Indoor unit, i: Floor radiator. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) An indoor unit that includes an outdoor unit that has a compressor, an outdoor heat exchanger, and a pressure reducing device, an indoor unit that has an indoor heat exchanger, and a floor radiator, and that connects the indoor unit to this outdoor unit. A dedicated connection first connection section, an indoor unit dedicated connection second connection section, a floor radiator dedicated connection section that connects the floor radiator piping, and a floor radiator on the upstream side of the pressure reducing device. A return connection section dedicated to the floor radiator is provided to connect the floor radiator piping, and the second connection section dedicated to the indoor unit and the connection section dedicated to the radiator are connected with connection auxiliary piping to perform the indoor heat exchange. A heat pump type floor heating system that connects a heat sink and a floor radiator in series. (2) The heat pump type floor heating apparatus 0 according to claim 1, wherein the diameter of the connection section dedicated to the radiator is larger than the diameter of the second connection section dedicated to the indoor unit.