JP2010133669A - Floor heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve rising properties due to delay in warm water production in a heat pump device by performing local heating in starting an operation, in a floor heating device applying the heat pump device as a heat source. <P>SOLUTION: When the floor heating operation is started, and the heat pump device 1 is started, a circulation pump 9 is stopped, and the water stored in a refrigerant-to-refrigerant heat exchanger 4 is stagnated and heated. A warm water temperature sensor 11 detects that a temperature of the warm water reaches a prescribed temperature, and a control section 10 calculates a distance between a pressure sensor 12 detecting a human body and the refrigerant-to-refrigerant heat exchanger 4 on the basis of a signal transmitted from the pressure sensor 12 of a specific number disposed on a floor surface, and calculates an operating time of the circulation pump 9. When the control section 10 operates the circulation pump 9 by the calculated time, the warm water is sent so that the warm water reaching the prescribed temperature is intermittently stagnated for a specific time around the pressure sensor 12 which detects the human body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a floor heating apparatus using a heat pump device as a heat source, and more particularly to a configuration in which quick warming is improved by performing local heating at the start of operation.

  For example, as shown in FIG. 4, the conventional floor heating apparatus includes a combustion apparatus 51, a heat source device 50 including a gas valve 58 that adjusts the supply amount of combustion gas to the combustion apparatus 51, a hot water pipe 52, A circulating pump 53 for circulating hot water in the hot water pipe 52; a floor heater 54 for arranging a part of the hot water pipe 52 in a meandering manner and heating the floor surface and the room by heat radiation from the hot water pipe 52; A remote controller 55 provided with an operation switch 55a and a room temperature sensor 55b is connected to the remote controller 55, and is provided with an open / close valve 57 that is provided on the output side of the hot water pipe 52 and starts and stops warm water circulation. The gas valve 58 of the combustion device 51 and the control device 56 that performs opening / closing control of the opening / closing valve 57 of the hot water pipe 52 are configured.

  A part of the hot water pipe 52 is wound around the outer peripheral surface of the combustion device 51 as a pipe-shaped heat exchanger 52a. When the gas supplied through the gas valve 58 is ignited and starts combustion in the combustion device 51, Water circulating through the pipe-shaped heat exchanger 52a is heated by the circulation pump 53 to generate hot water.

  When the operation switch 55a is pressed in the remote controller 55 and the room temperature is set, the controller 56 connected thereto adjusts the gas supply amount by the gas valve 58 and adjusts the combustion amount to adjust the amount of combustion. The temperature of the hot water flowing in 52a is heated to a predetermined temperature, and the heated hot water is circulated to the floor heater 54 by the circulation pump 53 to dissipate heat to the surroundings to heat the room.

The control device 55 has an intermittent operation function, and opens and closes an on-off valve 57 provided in the hot water pipe 52 at regular intervals, thereby causing the hot water to circulate and stay in the hot water pipe 52, thereby heating the controller 55. Energy efficiency is improved along with efficiency. For example, when the room temperature is lower than the set temperature, the opening time of the on-off valve 57 is lengthened to circulate hot water heated to a high temperature in the hot water pipe 52, and then the on-off valve 57 is closed for a predetermined time to supply hot water. It is made to stay in the hot water piping 52. By repeating this cycle, heating operation can be performed efficiently while maintaining energy saving. When the room temperature is higher than the set temperature, the opening time of the on-off valve 57 is shortened and the hot water is circulated in the hot water pipe 52, and then the on-off valve 57 is closed for a time longer than the opening time to As described above, when the heating load is large, the opening time of the on-off valve 57 is lengthened to increase the heating capacity, and when the heating load is small, the on-off valve 57 By shortening the opening time and reducing the heating capacity, the heating capacity can be varied in a wide range, while improving energy saving and heating efficiency, and also improving the quick warming at the start of heating operation. Yes.

However, unlike the above-described configuration, when a heat pump device in which a refrigerant circulates is used as a heat source for heating hot water, the maximum rising temperature of the hot water is lower than that of the heat source by the combustion device, and the hot water has a predetermined maximum. There is a problem that it takes a very long time to reach the temperature. When heating operation is started in cold weather such as midwinter, the temperature rise on the floor and room temperature is slow, and there is a possibility that the user feels uncomfortable. there were. For this reason, while using the heat pump apparatus excellent in the environmental property which does not discharge | emit carbon dioxide etc. as a heat source, the floor heating apparatus which improved quick warming property with the wide heating capability was calculated | required.
JP 2004-28474 A (page 4, FIG. 1)

  The present invention has been made in view of the above problems, and an object thereof is to provide a floor heating device that has a wide heating capacity and a quick warming property that is improved even in cold weather such as winter, while using a heat pump device that is environmentally friendly as a heat source. And

  In order to solve the above-mentioned problem, the present invention generates a hot water by exchanging heat from a heat source including a heat pump device in which a refrigerant circulates and heat from the heat source using an inter-refrigerant heat exchanger. In the floor heating apparatus provided with a hot water circuit that circulates in the hot water pipe embedded in the room and heats the room, and a control unit that controls these, the control unit circulates the refrigerant of the heat pump device, With the circulation pump stopped, water is retained in the inter-refrigerant heat exchanger and heated. When the water reaches a predetermined temperature or higher, the circulation pump is started and sent to a specific location of the hot water pipe. At the same time, by repeating the start and stop of the circulation pump, the hot water is intermittently retained in the specific location and is partially heated.

  Moreover, the said control part becomes a structure which sends out warm water to the said specific location by operating the said circulation pump corresponding to the distance to the said heat exchanger between refrigerant | coolants and the said specific location.

  In addition, a human body detection sensor is provided in the room, and the location detected by the human body detection sensor is the specific location.

  According to the first aspect of the present invention, in the floor heating apparatus using a heat pump device that requires a long heating time for heating the hot water as a heat source, the hot water is intermittently retained in a specific portion of the hot water pipe, and is partially heated. By doing this, energy consumption was reduced by heating only specific locations without impairing the quick warming at the start of operation and heating the entire floor surface even in normal times. Energy-saving operation can be performed.

  According to the second aspect of the present invention, by sending hot water corresponding to the distance between the inter-refrigerant heat exchanger and the specific location, in the hot water circuit, an electromagnetic on-off valve or a temperature sensor is not required, and the minimum equipment Heating can be performed at.

  According to invention of Claim 3, the location which the human body detection sensor detected is made into the said specific location, and it can heat efficiently with the minimum amount of hot water by sending out warm water, and the place where a person exists Can be heated centrally.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

  FIG. 1 is a configuration diagram of a floor heating apparatus according to the present invention, and FIG. 2 is a flowchart showing a control procedure. FIG. 3 is an explanatory diagram for explaining the second embodiment.

  As shown in FIG. 1, the floor heating apparatus according to the present invention includes a heat pump device 1 as a heat source for heating hot water, a hot water circuit 2 that performs heating by circulating hot water heated by the heat pump device 1, and these It is comprised from the various sensors with which it was equipped, and the control part. The heat pump device 1 has a refrigerant circuit from a compressor 3, a refrigerant heat exchanger 4 as a condenser, an expansion valve 5, an outdoor heat exchanger 6 as an evaporator, and a refrigerant pipe 7 connecting them. Compared with a heat source that burns gas and heats the hot water by circulating the refrigerant in the refrigerant circuit to generate hot water, the hot water does not emit carbon dioxide and other harmful gases. This is a heat source that is environmentally friendly.

  The hot water circuit 2 includes a hot water pipe 8 connected to the inter-refrigerant heat exchanger 4 and provided with a circulation pump 9 and arranged in a meandering manner under the floor surface of the room where heating is performed. Although not shown in the figure, the hot water pipe 8 formed in a serpentine shape is formed of, for example, a flat plate-like wide area heat radiating disposed under a flooring material. A heat insulating material or a heat storage plate for preventing heat radiation under the floor is disposed so as to sandwich the hot water pipe 8 together with the heat radiation plate. Also, in the inter-refrigerant heat exchanger 4, for example, refrigerant piping constituting the circulation circuit of the heat pump device 1 is arranged in a meandering manner, and water or hot water supplied from the hot water pipe 8 flows around the refrigerant piping. By doing so, the refrigerant and water or hot water exchange heat.

  In the heat pump apparatus 1 described above, the gaseous refrigerant that has been compressed by the compressor 3 to become a high temperature and high pressure flows into the inter-refrigerant heat exchanger 4 and heats it with water or hot water flowing around it to heat them. It cools and condenses. The refrigerant that has condensed into a liquid phase is subsequently expanded and decompressed by the expansion valve 5 to become a low-temperature and low-pressure two-phase refrigerant, and flows into the outdoor heat exchanger 6, where the outdoor heat exchanger 6 The gaseous refrigerant which has absorbed heat from the air flowing around and evaporates, and the evaporated gaseous refrigerant returns to the compressor 3 again.

  The hot water heated by the refrigerant circulating in the heat pump device 1 in the inter-refrigerant heat exchanger 4 is sent out to the meandering pipe disposed below the floor surface of the room by the circulation pump 9 and dissipates heat to the surroundings. After the surface and indoor air are heated, the refrigerant is recirculated to the heat exchanger 4 and heated.

  The principle of the present invention will be described using the configuration described above. As described in the background art, in general, a heat pump system as a heat source for producing hot water has a lower maximum temperature of hot water than a combustion system such as gas. For this reason, it is difficult to warm the entire large floor surface rapidly. Therefore, in order to make effective use of hot water at a low temperature, it is possible to perform control to intensively warm the place where the user is located or the place where the user is most frequently used, that is, the vicinity of a specific place, at the start of floor heating operation. This is a feature of the present invention.

  For this reason, hot water is circulated at a constant speed as in normal operation, and the temperature of the entire wide floor surface is not gradually raised, but the water retained in the inter-refrigerant heat exchanger 4 is heated to the maximum temperature to The hot water is circulated to a specific location at a speed several times that of normal operation, and the hot water is retained at the specific location to dissipate heat. The next warm water is heated in the inter-refrigerant heat exchanger 4 during this residence time, and the warm water heated to the maximum temperature is circulated again to a specific location as described above and repeatedly radiates heat while staying there. . Therefore, since only a specific location is repeated and warmed with the hot water having the highest temperature, the heating can be quickly started up locally.

  However, heat is radiated while the hot water at the highest temperature is circulated to a specific location, and the temperature of the hot water decreases. However, as shown in the following data, the heat radiates to other locations than the specified location by circulating at high speed. can do. For example, floor heating panel: 382 mm x 1720 mm, heat dissipation area 0.642 square meters, total heat dissipation 1464.4 watts, hot water pipe length 7.5 meters, and the floor heating panel outlet temperature measured at room temperature 20 ° C The ratio of the effects of the comparison is as follows.

  If the circulating flow rate of circulating hot water is 100%, the circulating flow rate is 108% when the circulating flow rate is 2 liters / minute, and 110% when the circulating flow rate is 3 liters / minute, increasing the circulating flow rate of hot water. By doing so, the heated hot water moves quickly, and there is little temperature drop in a specific location, that is, hot water having a relatively high temperature can be provided.

  Next, the control configuration will be described. As shown in FIG. 1, a number of pressure sensors 12 for detecting the pressure of the human body are provided on the floor surface of the room where the hot water pipes 8 formed in a serpentine shape are arranged below the floor surface. The signal line 13 indicated by a dotted line is connected to the control unit 10. Although not shown, the pressure sensor 12 is provided with a number indicating the order along the flow direction of the hot water, and the memory unit of the control unit 10 includes the inter-refrigerant heat exchanger 4 and the pressure of each number. The distance from the sensor 12 is stored in advance. The inter-refrigerant heat exchanger 4 is provided with a hot water temperature sensor 11 that detects the temperature of the hot water heated by the heat pump device 1, and the detected value detected by the hot water temperature sensor 11 is controlled by a signal line 15. 10 is sent out. The control unit 10 controls the start and stop of the compressor 3 of the heat pump device 1 and the operation capacity, and also controls the valve opening degree of the expansion valve 5. .

  In addition, the control unit 10 controls the start and stop of the circulation pump 9 that circulates the hot water through the hot water pipe 8 through the control line 14 and controls the flow rate of the hot water by controlling the rotation speed of the motor built in the circulation pump 9. Arbitrary or stepwise settings can be made. When stepwise, it is possible to set the super speed, the high speed, and the medium speed that is the normal flow speed. Moreover, the normal operation mode and the local heating mode performed at the time of the start of operation are set in the control part 10, These can be arbitrarily set now by the user with the remote controller which is not shown in figure.

  The above-described local heating mode will be described. In the heat pump device 1 that heats water by circulating the refrigerant, when a normal refrigerant is used, the maximum value of the obtained hot water temperature is about 70 ° C., and it takes time to sufficiently heat the room. If the floor heating system starts operating in cold weather such as midwinter, and the user wants to obtain a heating effect immediately, set the local heating mode using a remote controller, etc., and only the floor around the user Is heated, and a heating effect can be obtained in a short time.

  Next, a control procedure using the local heating mode will be described. As shown in the flowchart of FIG. 2, the control unit 10 first determines whether the operation mode set in the remote controller or the like is the local heating mode or the normal operation mode (STEP 1). If the operation mode set by the user is the local heating mode (STEP 1-YES), the operation of the heat pump device 1 is started (STEP 3), and if it is not the local heating mode (STEP 1-NO), water is supplied to the hot water circuit 2. Or the normal operation mode which heats with the heat exchanger 4 between refrigerant | coolants is performed, circulating hot water, (STEP2), and then jumps to (STEP1).

  In (STEP 3), the control unit 10 starts the heat pump device 1 but keeps the circulation pump 9 of the hot water circuit 2 in a stopped state so that water is not circulated through the hot water circuit 2. When the compressor 3 of the heat pump device 1 is activated, the water in the hot water circuit 2 that is retained in the inter-refrigerant heat exchanger 4 by condensing the refrigerant that has been compressed to high temperature and high pressure in the inter-refrigerant heat exchanger 4. Heat. The refrigerant obtained by heating and condensing the water in the hot water circuit 2 is subsequently depressurized by the expansion valve 5 to become a low-temperature and low-pressure two-phase refrigerant, and then flows into the outdoor heat exchanger 6 to be stored in the outdoor heat exchanger 6. The air flowing from the surroundings absorbs heat and evaporates, and then returns to the compressor 3 again. By repeating this cycle, the temperature of the water staying in the inter-refrigerant heat exchanger 4 gradually increases, thereby generating warm water.

  Next, the control unit 10 is necessary for the local heating mode in which the hot water temperature monitored via the hot water temperature sensor 11 provided in the inter-refrigerant heat exchanger 4 is set in the control unit 10 in advance. For example, it is determined whether or not a predetermined temperature of 70 ° C. has been reached (STEP 4). If the hot water temperature does not reach the predetermined temperature (STEP 4 -NO), the process jumps to (STEP 3) and the heating operation to the hot water is continued by the heat pump device 1.

  If the hot water temperature has reached the predetermined temperature (STEP 4 -YES), the control unit 10 then determines whether or not there is a person in the room by using a number of pressure sensors 12 disposed on the floor (STEP 5). . If it is determined that there is a person (STEP5-YES), then it is detected which pressure sensor 12 senses the human body (STEP6). This is detected by sending a detection signal from the pressure sensor 12 of the specific number to the control unit 10 when the pressure sensor 12 of the specific number is pressed by the human body.

  If it is not detected that there is a person in the room (STEP5-NO), for example, the control unit 10 designates a specific place such as the center of the room or the front of the TV as the detection place as a place where people gather. (STEP 7) and then jump to (STEP 8).

  Subsequently, the control unit 10 calculates the distance between the location detected or designated in (STEP 6) and (STEP 7) and the inter-refrigerant heat exchanger 4 (STEP 8). This is because the distance is read from the distance table between the inter-refrigerant heat exchanger 4 and each pressure sensor stored in advance in the memory unit of the control unit 10. In addition, about the sending direction of warm water, it is possible to calculate the distance in the direction closer to the left and right and send it to that direction. Next, the control unit 10 stores the operation time of the circulation pump 9 in advance in the memory unit of the control unit 10 from the calculated distance, and the flow velocity-distance-operation time table in which the flow velocity-distance-required operation time is plotted. (STEP 9) and the flow rate of the warm water to be sent out is set at a high speed so that the temperature does not decrease until it reaches a specific location.

  Next, the control unit 10 starts the circulation pump 9 and obtains hot water that has reached a predetermined temperature, for example, 70 ° C., from the inter-refrigerant heat exchanger 4 in (STEP 8). It sends out to the hot water pipe 8 with respect to the sending direction. And the control part 10 stops the circulation pump 9, if the read operation time passes in (STEP9) (STEP10). As a result, the hot water stays around the pressure sensor 12 where the human body is detected or around the designated location. Since there is some heat dissipation until the hot water reaches the designated location, the hot water temperature at 70 ° C may drop to around 60 ° C, but in winter the room temperature will drop below 10 ° C. In many cases, the heating effect is not impaired by this temperature difference. The warm water around 60 ° C staying in the vicinity of the human body releases heat to the surroundings through the hot water pipe 8, so that a person can get a feeling of heating, and the heat pump device 1 starts to start. Thus, the heating effect can be obtained within a short time, and the user's discomfort due to the poor start-up operation, which takes time until the room is sufficiently warmed, can be alleviated as much as possible.

  Next, the control unit 10 determines whether or not the local heating mode has elapsed for a certain time (STEP 10). It is determined in advance that the controller 10 is set in advance, and hot water is circulated through the hot water circuit 2 and heated by the heat pump device 1 to obtain sufficiently high temperature hot water. (STEP 10-YES), the control unit 10 jumps to (STEP 2) and switches the floor heating operation from the local heating mode to the normal operation mode. If the predetermined time has not been reached, (STEP 10-NO), jump to (STEP 3), and the user can continue to obtain the effect of quick warming by repeating the operation in the local heating mode as described above. It is like that.

  Even in the normal operation mode, after the room has been sufficiently heated, it is arbitrarily switched to the local heating mode, and the entire floor is not heated, but a specific portion is heated partially, so that energy such as electricity bills can be obtained. Energy saving operation with improved efficiency can be performed while saving. Further, in the hot water circuit 2, the local heating operation can be performed with the minimum equipment without using other equipment such as an electromagnetic on-off valve or a temperature sensor.

  Next, a second embodiment will be described. In the second embodiment, as shown in FIG. 3, a plurality of human bodies are detected in the room. When a plurality of human bodies are detected in the room by the pressure sensor 12 in the local heating mode, the control unit 10 stores the detected order according to the detected time. In accordance with the stored order, the control unit 10 stays in the inter-refrigerant heat exchanger 4, sends hot water that has reached a predetermined temperature to the vicinity of the pressure sensor 12 that was initially detected, and stays hot water for a predetermined period of time. Then, the hot water that has reached a predetermined temperature by the inter-refrigerant heat exchanger 4 is sent out in the vicinity of the detected pressure sensor 12. By repeating this, heating is performed fairly for the user in the room.

It is a block diagram of the floor heating apparatus by this invention. It is a flowchart which shows a control procedure. (A) is a 2nd Example, (B) is explanatory drawing explaining a 3rd Example, respectively. It is a block diagram which shows the conventional floor heating apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat pump apparatus 2 Hot water circuit 3 Compressor 4 Refrigerant heat exchanger 5 Expansion valve 6 Outdoor heat exchanger 7 Refrigerant piping 8 Hot water pipe 9 Circulation pump 10 Control part 11 Hot water temperature sensor 12 Pressure sensor 13 Signal line 14 Control line 15 Signal line

Claims (3)

A heat source consisting of a heat pump device in which the refrigerant circulates and heat from the heat source is exchanged by a heat exchanger between the refrigerants to generate hot water, and the circulation pump circulates in the hot water pipe buried under the floor. In a floor heating apparatus provided with a hot water circuit for heating a room and a control unit for controlling these,
While the control unit circulates the refrigerant of the heat pump device, while the circulation pump is stopped, water is retained in the inter-refrigerant heat exchanger and heated, and when the water becomes hot water of a predetermined temperature or more, The circulating pump is started and sent to a specific location of the hot water pipe, and by repeatedly starting and stopping the circulating pump, the hot water is intermittently retained at the specific location and partially heated. A floor heating device.   The said control part sends warm water to the said specific location by operating the said circulation pump corresponding to the distance to the said heat exchanger between refrigerant | coolants and the said specific location. Floor heating device.   The floor heating apparatus according to claim 1, wherein a human body detection sensor is provided in the room, and a location detected by the human body detection sensor is set as the specific location.

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