JPS5915733A - Temperature control device of heat pump type floor heating apparatus - Google Patents

Abstract

PURPOSE:To improve the comfortableness of room heating by a constitution wherein a compressor is controlled due to indoor temperature when both the floor heating and the heating by indoor blower are performed and due to floor temperature when only the floor heating is performed in the titled heating apparatus, in which both a floor radiator and an indoor heat exchanger are utilized. CONSTITUTION:When the utilization of a floor radiator 5 only is requested, the compressor 1 is put into operation by turning a power supply 11 ON, an operating switch 12 ON and by changing-over a cooling-heating change-over switch 13 to a hot side (c), a four-way valve 2 to a heating circuit, and a change-over switch 14 to a floor-heating side (e). After that, the compressor 1 and an outdoor blower 10 are ON-OFF-controlled by the actuation of a floor temperature sensor relay 17 of the floor temperature sensor (not shown) of the floor radiator 5. when the combined utilization of the floor radiator 5 and the indoor blower 4 is requested, the change-over switch 14 is changed-over to a floor-heating plus hot-air side (d). Consequently, a room temperature sensor switch 16 is put into operation by a room temperature sensor (not shown) in order to ON-OFF- control the compressor 1, an indoor blower 4, and the outdoor blower 10. Due to the constitution as mentioned above, the detection of temperature is ensured and the comfortableness can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a floor radiator disposed below the floor of a dwelling;
The present invention relates to a temperature control device for a heat pump type floor heating device that includes an indoor heat exchanger that exchanges heat with indoor air in a refrigeration cycle.

Conventional structure and its problems Conventional, basic heat pump type floor heating system refrigeration 2 - As shown in Figure 1, the refrigeration cycle uses compressor 1 to switch the flow of refrigerant between cooling and heating. A four-way valve 2, an indoor heat exchanger 3 that serves as a condenser during heating and an evaporator during cooling, a floor radiator 5 through which refrigerant flows only during heating, and a check that prevents refrigerant from flowing into the floor radiator 6 during cooling operation. A valve 6, a pressure reducing device 8, an outdoor heat exchanger 9 that functions as an evaporator during heating and a cooling condenser are connected in a ring, and a floor radiator 6 is connected during heating operation.
It was constructed by connecting a check valve 7 that allows refrigerant to flow into a series circuit consisting of a floor radiator 5 and a check valve 6 in parallel. Further, the indoor heat exchanger 3 is provided with all indoor blowers 4, and the outdoor heat exchanger 9 is provided with all outdoor blowers 1Q.

The flow of the refrigerant during heating operation is as shown by the solid line arrow in the figure, where the refrigerant I-
J: Passes through the four-way valve 2, radiates heat through the indoor heat exchanger 3 and floor radiator 5, condenses here, passes through the check valve 6, is depressurized by the pressure reducing device 8, and becomes low pressure in the lower part for outdoor heat exchange. After being evaporated in the vessel 9 and passing through the four-way valve 2 again, it returns to the compressor 1, and the cycle is repeated.

A heat pump type floor heating system of 3 pages or more can perform heating in the following two operation modes.

The last one is the original floor heating, which performs heating using radiant heat from the indoor heat exchanger 3 and floor radiator 5 without operating the indoor blower □4.

The other method performs heating by combining the function of hot air heating with the original floor heating, which uses radiant heat from the floor radiator 5 and hot air supplied by operating the indoor blower 4. Heating is performed by both.

Conventionally, no matter which heating method is used, only one limited means has been adopted for temperature control. One room? Temperature control was performed by either room temperature control to keep the temperature constant at 1Mk or bed temperature control to keep the entire bed temperature constant.

However, such temperature control using either room temperature control or floor temperature control does not provide a comfortable heating effect for the following reasons.

Figures 2, 3, 4, and 5 show the changes in room temperature and floor temperature under the same outside air mixture. Figure 2 shows the room temperature when the indoor fan is stopped. Figure 3 shows the changes in floor temperature and room temperature due to control. Figure 3 shows the changes in room temperature and floor temperature due to bed temperature control when the indoor fan is stopped, and Figure 4 shows the room temperature control when the indoor fan is operated. FIG. 5 shows changes in room temperature due to bed temperature control when an indoor blower is operated. In addition, in the case of each room temperature control shown in FIGS. 2 to 5, the set temperature is set to 21±0.5°C, and in the case of bed temperature control, the set temperature is set to 36±2°C.

That is, in room temperature control, problems tend to occur when the indoor blower is stopped and the original floor heating is performed. This is because the heating effect when the indoor blower 4 is stopped is approximately 10% due to radiant heat from the indoor heat exchanger 3 and approximately 90% due to radiant heat from the floor radiator 5. The effect of the floor radiator 5 is significant. In the case of radiant heating, the absolute temperature T1. Heat is exchanged between the objects at T2, and the amount of heat is proportional to (sign T4), 5
Beko! Since it has a property that it does not depend on the temperature of the air in the middle, even if the room temperature is somewhat low, if the temperature of the floor radiator 5 is high, a comfortable feeling of heating can be obtained.

Therefore, it can be understood that since the room temperature has little effect on the occupant's feeling of heating, it is not effective to control the temperature by stopping the indoor fan 4 and performing the original floor heating.

To be more specific, Figure 2 shows all the changes in the floor radiator temperature, that is, the floor temperature and room temperature, due to room temperature control when all indoor fans 4 are stopped and the original floor heating is performed. , in the same figure, due to the operation and stop of the compressor F, the room temperature 't is within its set temperature, 21±0, as shown by the solid line a.
．． If the temperature is kept at 5℃, the bed temperature will be 8℃ as shown by the solid line.
C also tends to change, causing discomfort to the occupants.

Furthermore, if room temperature control is performed when the indoor blower 4 is stopped, the operation mode for mounting the room temperature sensor will vary depending on the location. In other words, the room temperature sensor is usually installed on the suction side near the indoor heat exchanger, but when the indoor fan 4 is stopped, it senses the entire temperature of the indoor heat exchanger itself instead of the 6 vane room temperature, making it difficult to accurately measure the temperature. It does not detect room temperature.

As described above, in room temperature control, when heating is performed by stopping the indoor blower 4, various problems arise when performing the original floor heating.

Next, a case will be described in which temperature control during floor heating is performed by operating the indoor blower 4 and also performing hot air heating by detecting only the floor temperature. In such a case, when looking at the heating effect when the indoor blower 4 is operated, approximately 70% of the heating effect is due to the warm air supplied from the indoor blower 4, and the heating effect is due to the supply of hot air from the indoor blower 4.
The radiant heat from the room accounts for about 30% of the effect, making the hot air heating effect a large part of the equation. In other words, in this case, it is the warm air from the indoor fan 4 that can affect the feeling of heating for the occupants.
Radiant heat from the floor radiator 5 has almost no effect.

Therefore, it can be understood that it is not effective to control the temperature by floor temperature control when all hot air heating is being performed in addition to floor heating.

More specifically, when the outside temperature drops, the temperature of the refrigerant discharged from the compressor 1 decreases due to the nature of the heat pump, and a cold draft occurs in the air blown from the indoor blower 4. As mentioned above, the feeling of heating for the occupants is affected not by the radiant heat from the floor radiator, but by the warm air from the indoor fan 4, but with floor temperature control, although the floor temperature can be detected, the air being blown is cold. Drafts cannot be detected and cause discomfort to occupants. As described above, floor temperature control causes various problems when the indoor blower 4 is fully operated, that is, when a heating effect is obtained by combined use of floor heating.

As described above, temperature control by the conventional heat bomb type floor heating apparatus was performed by either room temperature control or floor temperature control, and therefore a comfortable heating effect could not be achieved.

Purpose of the Invention The present invention eliminates the above-mentioned drawbacks of the conventional technology. This ensures that the temperature can be detected accordingly.

Structure of the Invention In order to achieve this object, the present invention detects the indoor temperature when the indoor blower is operating during floor heating operation and performs intermittent operation of the compressor, and detects the floor surface temperature when the indoor blower is stopped. The compressor is operated intermittently to control the heating temperature.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Here, the basic structure and operation of the cryocycle are the same as those of the prior art and are as shown in FIG. 1, so their explanation will be omitted. Therefore, the point of switching between bed temperature control and room temperature control will be explained here.

First, let's talk about the circuit that switches between floor temperature control and room temperature control.
This will be explained using figures.

In the figure, in the case of floor temperature control in which the indoor blower 4 is stopped and heating is performed only from the floor radiator 5, the power supply 11 is applied, the operation switch 12 is closed, and the cooling/heating changeover switch 1
3 is turned on to "warm" which is the heating side, the four-way valve 2 is energized to form a heating circuit, and the changeover switch 14 is turned on to switch between only floor heating or a combination of floor heating and hot air heating. Put it in the "floor heating" on the right side. In this state, the compressor 1 is operated and radiant heating from the floor radiator 5 is performed.

As shown in FIGS. 7 and 8, when the temperature of the mounting part of the floor temperature sensor 32 buried inside the floor radiator 6 reaches its set temperature, the floor temperature sensor switch 17 opens and the relay 2o is activated. The compressor 1 via its a contact 24 as de-energized
and stops the operation of the outdoor blower 1o.

Thereafter, as is well known, the compressor 1 is operated intermittently according to the temperature detected by the bed temperature sensor 32, and heating temperature control is performed.

Next, a description will be given of room temperature control in which the indoor blower 4 is operated to perform a combined operation of floor heating and warm air heating.

- Also in this case, the power supply 11 is applied, the operation switch 12 is closed, and the cooling/heating changeover switch 13 is turned on to the "floor heating/warm air" setting on the left side. As a result, the relay 19 is energized, and its a contacts 23 and 28 are closed. The compressor 1, the outdoor blower 1o, and the indoor blower 4 are respectively operated.

As shown in FIGS. 7 and 9, when the room temperature sensor 31 installed on the suction side of the indoor heat exchanger 3 detects the set temperature, the heating room temperature sensor switch 16 opens and the relay 19
The compressor 1 and the outdoor blower 1o are connected through each contact 23, 28 of the
and the operation of the indoor blower 4 is stopped.

Hereinafter, depending on the flow rate detected by the room temperature sensor 31, the compressor 1
, the indoor blower 4, and the outdoor blower 1o are operated intermittently, and heating temperature control is performed.

In addition, during cooling operation, the operation switch 12 is closed and the cooling/heating changeover switch 13 is set to "COLD" on the left side. In this state, the compressor 1 is operated, and the refrigerant flows as shown by the broken line arrow in FIG. 1 to perform cooling. Then, by the opening/closing operation of the cooling room temperature sensor switch 15, which is activated by the temperature detected by the room temperature sensor 31, the compressor 1 indoor blower 4 is operated intermittently via the contacts 22 and 27 of the relay 18, as is well known, to control the cooling temperature. I do.

11 Boehmi Here, to explain in detail the installation of the bed temperature sensor 32 and the room temperature sensor 31, the bed temperature sensor 32 is installed inside the floor radiator 6 as shown in FIG. Alternatively, the broken room temperature sensor 31 is configured to be able to detect the surface temperature of the radiator, and a resin support 33 is attached to the upwind side (suction side) of the surface of the indoor heat exchanger 3 in the indoor unit 3Q, as shown in FIG. It is installed through the sensor and detects the temperature of the indoor air (intake air) flowing as shown by the dotted arrow.

As described above, when the indoor blower 4 is stopped and heating is performed using radiant heat from the indoor heat exchanger 3 and floor radiator 5, 90% of the heating effect in 1 is due to the radiant heat from the floor radiator 5. Therefore, during floor heating, it is effective to control the floor temperature by detecting the temperature of the floor radiator 6.

In other words, to explain in more detail with reference to FIG. 3, which shows changes in room temperature and floor radiator temperature (floor temperature) due to floor temperature control when indoor fan 4 is stopped and 10 original floor heating is performed, compression When the bed temperature is maintained at the set temperature d] of 35°C by operating and stopping machine 1, as shown by the solid line d, the room temperature will not change by Q, 5°C as shown by the solid line C. , the temperature can be controlled without causing any discomfort to the occupants.

Next, when the indoor blower 4 is fully operated to perform a combined operation of floor heating and hot air heating, 70% of the heating effect comes from the warm air supplied from the indoor blower 4, so the indoor heat exchanger 4's suction Room temperature control that detects temperature and performs temperature control is effective.

That is, even if the outside temperature drops and a cold draft occurs, the influence of this cold draft can be detected by controlling the room temperature, so that the influence on the occupants can be reduced. In other words, in Fig. 4, which shows the room temperature control state when the indoor blower 4 is operated and the original floor heating and warm air heating are operated together, the solid line e indicates the room temperature when the compressor 1 is started or stopped. As shown in , if the temperature is maintained at 210.5°C, which is within the set temperature, the temperature of the floor radiator will be the solid line f.
As shown in , since the temperature changes by only 4° C., the temperature can be controlled without causing any discomfort to the 13 residents.

Furthermore, new results can be obtained in terms of energy saving as shown below.

In other words, when comparing Figures 2 and 3, indoor blower 4'
(!-If the room temperature is controlled as shown in Figure 2 when the compressor 1 is stopped and the original floor heating is performed, the actual operating rate during one cycle of operation and stop of the compressor 1 is 60%. , 3rd
As shown in the figure, if the bed temperature is controlled, it will be 55%, resulting in a power saving of 5 cm.

Comparing Figure 4 and Figure 5, when indoor fan 4 is operated and floor heating and hot air heating are operated together,
When controlling the bed temperature as shown in the figure, the operation of compressor 1,
The operating rate during one cycle of stoppage is 55 units, but if room temperature control is performed as shown in FIG. 4, the operating rate becomes 44 units, resulting in a power saving of 11 units.

Effects of the Invention As is clear from the above embodiments, the present invention performs intermittent operation of the compressor at the temperature of the floor surface during floor heating in which heating is performed using radiant heat from a floor radiator. In addition, when used in conjunction with hot air heating that blows air through the indoor heat exchanger, the room temperature is detected and the compressor is operated intermittently, so the temperature can be detected optimally according to each operating situation, and the temperature change power can be minimized. It has various advantages, such as being small and providing a comfortable heating effect, and since it can detect the optimum temperature, there is no unnecessary operation of the compressor, indoor blower, etc., and there is extremely little wasted energy consumption. be.

[Brief explanation of the drawing]

Figure 1 is a refrigeration cycle diagram of a heat pump floor heating system.
Figure 2 is an explanatory diagram showing the floor temperature and the temporal change in room temperature due to room temperature control when the indoor fan is stopped, and Figure 3 is the temporal change in room temperature and floor temperature due to floor temperature control when the indoor fan is stopped. Figure 4 is an explanatory diagram showing the floor temperature and room temperature changes over time due to room temperature control when an indoor fan is operated, and Figure 6 is an explanatory diagram showing room temperature and room temperature changes over time when the indoor fan is operated. An explanatory diagram showing temporal changes in floor temperature, FIG. 6 is a circuit diagram of a temperature control device for a floor heating system according to an embodiment of the present invention, and FIG. 7 is a page 15 floor temperature sensor and room temperature sensor for the same floor heating system. For installation, see the explanatory diagram showing the position,
Figure 8 is an explanatory diagram showing the installation status of the four bed temperature sensors, Figure 9
The figure is an explanatory diagram showing how the room temperature sensor is installed. 1...Compressor, 3...Indoor heat exchanger, 4
...Indoor blower, 5...Floor radiator,
8... Pressure reduction device, 9... Outdoor heat exchanger, 31... Room temperature sensor, 32... Floor temperature sensor. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 4 Mochisu (mLr+) - Figure 5 M% LrtfbnE → Shoga glaze] -

Claims (1)

[Claims] A refrigeration cycle is constructed by connecting a compressor, an indoor heat exchanger, a floor radiator, a pressure reducing device, and an outdoor heat exchanger in a ring, and an indoor blower is attached to the indoor heat exchanger to adjust the temperature during heating operation. The heat pump is controlled so that when the indoor blower is stopped, the bed temperature is detected and the compressor is operated intermittently, and when the indoor blower is in operation, the room temperature is detected and the compressor is operated intermittently. Temperature control device for floor heating system.