JPS5888555A - 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 The present invention relates to a heat pump floor heating system that performs heating using a floor radiator provided on the floor.

Conventionally, in heat pump floor heating systems that perform heating using a floor radiator installed on the floor, the compressor is turned on and off by detecting the room temperature. It was very difficult to construct the room temperature detection means. In other words, since the heat pump type floor heating system described in 2..-2 uses natural convection, there is almost no wind inside the room, and unless the thermistor itself as a temperature detection element is made very small and has a small heat capacity, transient Because it is not possible to respond immediately to changes in room temperature, it is not possible to provide comfortable heating. Also, if the temperature range (differential) of the room temperature is large, the floor will become completely cold when the compressor stops, making it impossible to comfortably heat your head and feet, so set the differential to 0.5.
℃, but this is technically difficult, and even if it could be achieved, it would require a very expensive control device.

In view of the above points, an object of the present invention is to provide a heat pump type floor heating device that can accurately control floor surface temperature with an extremely simple circuit configuration.

That is, the present invention requires that the temperature and pressure of the refrigerant in the gas-liquid two-phase region in the pipe line from the discharge port of the compressor to the pressure reducing device correspond accurately to the temperature of the floor radiator. Detecting the temperature or pressure of the refrigerant using
6- A detection means for detecting temperature and a control means for controlling the amount of heat radiated from the floor radiator based on a detection signal from the detection means are provided to control the amount of heat radiated according to the temperature of the floor radiator. Since it has a larger differential than conventional room temperature detection devices, it is possible to accurately control the floor surface temperature with an extremely simple circuit configuration, and it can therefore be manufactured at low cost while still providing comfortable floors. It can provide heating.

An embodiment of the present invention will be described below based on the drawings. First, the refrigeration cycle structure of a heat pump floor heating system will be explained with reference to FIG.

In the figure, 1 is a compressor, 2 is a floor radiator provided on the floor, 3 is a pressure reducing device, and 4 is a heat source side heat exchanger, which are connected in a ring to form a refrigeration cycle. . Further, a temperature thermistor 6 is attached to the outer peripheral surface of the conduit 5 connecting the floor radiator 2 and the pressure reducing device 3 to detect the temperature of the refrigerant in the conduit 6 via the circumferential wall of the conduit 5. ing.

Next, an electric circuit diagram of the heat pump type floor heating apparatus having the above configuration will be explained with reference to FIG.

In the figure, 7 is the thermal and mister contact of the temperature thermistor 6, 8 is the coil of the relay, and 9 is the contact of the relay.
10 is an operation switch; 11 is a motor for the compressor 1;
2 is a power source, one end and the other end of a series circuit of the operation switch 1o, thermistor contact 7, and relay coil 8 are connected to one end and the other end of the power source 12, respectively;
Further, the series circuit of the thermistor contact 7 and the relay coil 8 is connected in parallel with the series circuit of the relay contact 9 and the motor 11.

In the above configuration, when the operation switch 1o is turned on, if the thermistor contact 7 is closed, that is, if the refrigerant in the pipe line 6 is below the set temperature, the relay coil 8 is energized, the relay contact 9 is closed, and the motor 11vc is energized. Since electricity is applied, the motor 11 rotates and the compressor 1 is operated. Thereby, the heat of the refrigerant discharged from the compressor 1 is radiated by the floor radiator 2.

The state of heat radiation of the refrigerant in the floor radiator 2 is shown in five pages corresponding to points from the mermaid to point B in the Mollier diagram shown in FIG. 8, and at point B, the refrigerant is in a gas-liquid mixed state.

Thereafter, the refrigerant is depressurized by the decompression device 3, returned to the compressor 1 via the heat source side heat exchanger 4, and is circulated in the same manner. The temperature detected by the temperature thermistor 6 during this heating operation is approximately the same as point B on the Mollier diagram shown in FIG.

That is, point B is a gas-liquid two-phase region, and the temperature does not change unless the pressure changes, so this temperature is the same as the temperature of the floor radiator 2. In other words, the temperature of the floor radiator 2 is known through the pipe 5 in the gas-liquid two-phase region, and by keeping this at a floor level of approximately BO''QK, which is considered to be a comfortable heating operation, a comfortable floor heating operation with a cold head and warm feet is possible. In addition, the differential at this time only needs to be around 2 degrees Celsius, which is technically simple and the control device can be made inexpensive, and the room temperature will be 0 if the floor surface temperature fluctuates by about 2 degrees Celsius.
．． The temperature is below 5 degrees Celsius, allowing for comfortable floor heating.

In the above embodiment, an example was described in which the temperature was detected in the pipe 5 portion, but the temperature may be detected in the gas-liquid two-phase region in the middle of the floor radiator 2.

6., -1.Also, in the above embodiment, an example was explained in which the temperature in the gas-liquid two-phase region was detected, but the refrigerant pressure in the gas-liquid two-phase region was detected by a pressure switch. A similar effect can be obtained by using a circuit configuration that combines a timer and a timer.

Further, in the above embodiment, an example was explained in which the compressor 1 was controlled on and off, but if instead of this, the amount of heat dissipation was increased or decreased by increasing or decreasing the amount of refrigerant circulation, it would be possible to control the compressor 1 more precisely. Since it is possible to control the floor surface temperature, more comfortable floor heating operation is possible.

As explained above, the heat pump type floor heating device according to the present invention includes a compressor, a floor radiator installed on the floor,
A detection means for detecting the temperature or pressure of a refrigerant in a gas-liquid two-phase region in a pipe line from a discharge port of the compressor to the pressure reduction device, comprising a refrigeration cycle consisting of a pressure reduction device and a heat source side heat exchanger; and a control means for controlling the amount of heat radiation of the floor radiator based on the detection signal of the detection means,
Diff 7 compared to conventional ones that detect room temperature.
It has the advantage of being able to have a large page average, and therefore accurately controlling the floor surface temperature with an extremely simple circuit configuration without the need for special expensive detection equipment, and providing comfortable floor heating while being inexpensive to manufacture. It has the following effects.

[Brief explanation of the drawing]

Figure 1 is a refrigeration cycle diagram of a heat pump floor heating system according to an embodiment of the present invention, Figure 2 is an electric circuit diagram of the same floor heating system, and Figure 3 is a Mollier diagram of the refrigeration cycle of the same floor heating system. be. 1... Compressor, 2... Floor radiator, 3
...... Pressure reduction device, 4 ... Heat source side heat exchanger, 5 ... Pipe line, 6 ... Temperature thermistor, 7 ... Thermistor Contact, 8... Relay coil, 9... Relay contact, 11...
·motor. Name of agent: Patent attorney Toshio Nakao and 1 other person $2
Figure 1θ Figure 3 En/7 nol pi

Claims (1)

[Claims] The refrigeration cycle includes a compressor, a floor radiator installed on the floor, a pressure reducing device, and a heat source side heat exchanger, and the air in the pipe from the compressor discharge port to the pressure reducing device is A heat pump type floor heating device comprising: a detection means for detecting the temperature or pressure of a refrigerant in a liquid two-phase region; and a control means for controlling the amount of heat radiated from the floor radiator based on a detection signal from the detection means.