JP6404746B2 - Hot water heater - Google Patents

Description

  The present invention relates to a hot water heating apparatus in which a hot water path between a heat source device installed outdoors and an indoor unit installed indoors is connected via a hot water outlet.

Conventionally, in this type of apparatus, a hot water path between a heat source unit installed outdoors and an indoor unit installed indoors is connected via a hot water outlet, and is heated by the heat source unit. The warm water is circulated to the indoor unit through the hot water outlet, and the air exchanged in the indoor unit is sent out indoors as warm air by the blower fan.
(For example, refer to Patent Document 1.)

  The indoor unit includes a stand that is installed on the floor, and a front panel and a back cover that are attached to the front and rear of the upper portion of the stand. However, lead wires each having a room temperature thermistor connected to the front end by a connector are led out, and the front end portion of the hot water tube is connected to a connector fixed to an indoor wall surface, etc. The fixing device for fixing the lead wire and the support device for supporting the room temperature thermistor are attached to the lower part of the device.

  However, due to installation conditions when the casing is installed indoors, for example, when the hot water tube is led out toward the other side of the back cover, the room temperature thermistor is close to the hot water tube or Due to the contact, it may be impossible to detect the correct room temperature due to the influence of the temperature of the hot water flowing in the same hot water tube.Therefore, it is separated from the same hot water tube according to the direction in which the hot water tube is led out from the back cover. Some room temperature thermistors can be replaced at the positions.

This is because when the hot water tube is led out to the one side outward direction of the back cover, the locking portion provided in the support is locked in the locking hole provided in the other side lower portion of the back cover, A screw between a locking hole provided in the lower part on the other side of the connector and the back cover with a screw inserted through an insertion hole of the fixing tool in a state where a part of the lead wire is clamped by a clamping part of the fixing tool When the hot water tube is led out to the other side of the back cover, the room temperature thermistor is supported by the support and the lead wire is fixed by the fixture. A locking portion provided in the support is locked in a locking hole provided in one upper part of the back cover, and a screw inserted through the insertion hole of the fixing tool is provided in one upper part of the connector and the back cover. Screw into the screw holes between the provided locking holes The room temperature thermistor is supported by the support and the lead wire is fixed by the fixture.
(For example, see Patent Document 2)

JP-A-11-14082 JP 2000-18629 A

  By the way, in this conventional one, the indoor unit is connected to another connector in a room where a plurality of connectors are provided on the wall surface of the room, or the indoor unit is moved to another room and connected to the destination room. When the room temperature thermistor comes close to or comes into contact with the hot water tube when connected to a vessel, and the room temperature cannot be detected accurately, the user must change the position of the room temperature thermistor himself. I didn't.

In order to solve the above-described problem, in claim 1 of the present invention, a blower fan and a heat exchanger are provided in a housing in which an air suction port and a hot air outlet are formed, and hot water heated by a heat source device is supplied from a connector. After passing through the heat exchanger through the hot water tube and returning from the connector to the heat source device again through the hot water tube, the air sucked from the air suction port is heat-exchanged by the heat exchanger and then blown. In a hot water heater that blows into the room from the hot air outlet using a fan, a room temperature thermistor that detects room temperature is provided at least at both ends of the back of the housing , and the lowest when all the detected temperatures detected by the room temperature thermistor are below a predetermined temperature. the detected temperature is adopted as the room temperature is compared with the set room temperature set by the room temperature and operating unit which is its adoption, and performs operation as room temperature to be detected is set at room temperature

Further, in claim 2, when all the detected temperatures of the room temperature thermistor are equal to or higher than a predetermined temperature in claim 1, the operation is stopped by displaying an error of all the room temperature thermistors on the display unit, and the detected temperature is predetermined. When there is a room temperature thermistor that is above the specified temperature and a room temperature thermistor that is less than the specified temperature, an error is displayed on the display section where the detected temperature is above the specified temperature, and an error is detected and the detected temperature is below the specified temperature. The detection temperature of the room temperature thermistor is adopted as the room temperature, the room temperature adopted is compared with the set room temperature set by the operation unit, and operation is performed so that the detected room temperature becomes the set room temperature. When the temperature is lower than the temperature and the difference in the detected temperature is equal to or higher than the predetermined temperature, an installation state confirmation display is performed on the display unit.

  According to the first aspect of the present invention, the room temperature thermistor for detecting the room temperature is provided at least at both ends of the rear surface of the housing, and the operation is performed with the lowest temperature detected among the detected temperatures detected by the room temperature thermistor. Even if a hot water tube is close to the thermistor, or one room temperature thermistor is not close to the wall and is not close to the wall, and the heat is trapped around it, the detected temperature of the other room temperature thermistor It is possible to prevent the operation from being stopped before the room temperature rises to the set temperature by performing the operation by comparing it with the set temperature as the room temperature.

  According to claim 2, when all the detected temperatures of the room temperature thermistor are equal to or higher than a predetermined temperature, the operation is stopped and an error is displayed, so that the operation can be prevented without detecting the room temperature. Furthermore, by displaying an error display for all room temperature thermistors, it is possible to notify the user that both room temperature thermistors have failed.

  In addition, when there is a room temperature thermistor whose detected temperature is higher than or equal to a predetermined temperature and a room temperature thermistor whose temperature is lower than the predetermined temperature, operation is performed with the lowest detected temperature among room temperature thermistors whose detected temperature has not reached the predetermined temperature. Even if there is something abnormal in the room temperature thermistor, it can be operated.In addition, an abnormality has occurred in the room temperature thermistor, or a hot water tube is in contact with the room temperature thermistor. It is possible to notify the user that it is in an abnormal state in which heat is trapped in the vicinity without being spaced apart by a predetermined distance.

  Also, when the detected temperature of all room temperature thermistors is less than the specified temperature and the difference in detected temperatures is greater than or equal to the specified temperature, the installation status confirmation is displayed, so the room temperature thermistor is not abnormal, but the hot water tube is close to the room temperature thermistor. Or one room temperature thermistor side is not separated from the wall by a predetermined distance, and it can be determined that the heat is trapped in the surroundings, and it is not normal. Can be notified to the user to confirm the distance.

BRIEF DESCRIPTION OF THE DRAWINGS The external appearance perspective view of the hot water heating apparatus which attached | subjected one Example of this invention. The perspective view of the back side. The flowchart figure of the control.

Next, a hot water heater according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes an indoor unit housing, which is composed of a stand 2 installed on the floor surface, and a front panel 3 and a back cover 4 which are attached to the front and rear of the top of the stand 2. The air outlet 5 is provided, and the back cover 4 is provided with an air inlet 6.

  The housing 1 includes a blower fan (not shown) and a heat exchanger (not shown) in an air path connecting the air inlet 6 of the back cover 4 to the hot air outlet 5 of the front panel 3, Hot water heated by an outdoor unit (not shown) as a heat source unit is circulated to the heat exchanger, and the air sucked from the air suction port 5 is heat-exchanged by the heat exchanger, and then the blower fan Is blown into the room from the hot air outlet 2.

  A hot water tube 7 has a connector 8 attached to one end, and the other end connected to the inflow side of the heat exchanger in the housing 1 from the lower part of the back cover 4, and the connector 8 is provided on a wall surface or the like. By connecting to a hot water outlet (not shown) connected to the outdoor unit, the hot water heated from the outdoor unit passes through the heat exchanger from the hot water outlet to the connector 8 and from the hot water tube 7 to the hot water tube again. 7 through the connector 8 and the hot water outlet to return to the outdoor unit.

  Reference numerals 9 and 10 denote room temperature thermistors which are provided at both ends of the lower portion of the back cover 4 and detect the room temperature.

An operation unit 11 is provided on the upper surface of the casing 1 and is provided with an operation switch (not shown) and various switches (not shown).
Reference numeral 12 denotes a display unit for displaying set temperature and room temperature, time and time, abnormality display, alarm display, and the like.

Next, the operation will be described with reference to FIG.
First, when the operation switch of the operation unit 11 is turned on (S1), the room temperature is detected by the room temperature thermistor 9 and the room temperature thermistor 10 respectively provided at both ends of the lower portion of the back cover 4. (S2)

Then, the detection temperature of the room temperature thermistor 9 and the detection temperature of the room temperature thermistor 10 are compared. When both the detection temperatures are predetermined temperatures, for example, both the detection temperatures are 50 ° C. or more (S3), the room temperature thermistor 9 and the room temperature thermistor 10 It is determined that an abnormality has occurred in both of them (S4), an error display of the room temperature thermistor is displayed on the display unit 12 (S5), the operation is stopped (S6), and the process returns to (S1).

  If the detected temperature of both the room temperature thermistor 9 and the room temperature thermistor 10 is not equal to or higher than the predetermined temperature of 50 ° C. in (S3), then the detected temperature of either the room temperature thermistor 9 or the room temperature thermistor 10 is the predetermined temperature of 50 ° C. When one of the detected temperatures is equal to or higher than a predetermined temperature of 50 ° C., an abnormality has occurred in one of the room temperature thermistors, or the hot water tube 7 is in contact with the one of the room temperature thermistors. Or one of the room temperature thermistors is not in a predetermined distance from the wall and is in close proximity, and is judged to be in an abnormal state where heat is trapped in the vicinity. (S8)

An error is displayed on the display unit 12 indicating that an abnormality has occurred on the side of the room temperature thermistor whose detected temperature is equal to or higher than the predetermined temperature of 50 ° C. (S9), and the room temperature thermistor whose detected temperature is lower than the predetermined temperature of 50 ° C. The detection temperature is adopted as room temperature.
(S10)

  Then, the adopted room temperature is compared with the set room temperature set by the operation unit 11, the operation is continued so that the detected room temperature becomes the set room temperature (S11), and then the operation switch is turned off. The process proceeds to (S6), and if the operation switch is not turned OFF, the process returns to (S11). (S12)

  When both the room temperature thermistor 9 and the room temperature thermistor 10 are used in (S7), the lower detection temperature of the room temperature thermistor 9 and the room temperature thermistor 10 is adopted as the room temperature (S13). Is compared with the set room temperature set by the operation unit 11, and the operation is continued so that the detected room temperature becomes the set room temperature. (S14)

  Then, the detected temperatures of the room temperature thermistor 9 and the room temperature thermistor 10 whose detected temperature is less than the predetermined temperature of 50 ° C. are compared, and it is determined whether the temperature difference between the detected temperatures is a predetermined temperature, for example, 5 ° C. ) When the temperature difference between the detected temperatures is 5 ° C or higher, the room temperature thermistor is not abnormal, but the hot water tube 7 is close to the room temperature thermistor, or one room temperature thermistor side is at a predetermined distance from the wall. It is determined that the state is not normal but close and heat is trapped in the surroundings (S16), and a confirmation display of the installation state is displayed on the display unit 12. (S17)

  Then, if the operation switch is turned off, the process proceeds to (S6), and if the operation switch is not turned off, the process returns to (S15). (S18)

  As described above, the room temperature thermistor 9 and the room temperature thermistor 10 are provided at both lower ends of the back cover 4, and the lower one of the detected temperatures is set to room temperature, so the hot water tube 7 is close to one room temperature thermistor. Even if one of the room temperature thermistors is close to the wall and not close to the wall and heat is trapped around it, the temperature detected by the other room temperature thermistor is taken as the room temperature and the set temperature. It is possible to prevent the operation from being stopped before the room temperature rises to the set temperature.

  In addition, when both the room temperature thermistor 9 and the room temperature thermistor 10 are detected at a predetermined temperature or more, both the room temperature thermistors are judged to be abnormal, and the operation is stopped. Therefore, the operation is prevented without detecting the room temperature. Furthermore, by displaying an error display for all the room temperature thermistors, it is possible to notify the user that both of the room temperature thermistors have failed.

  When one of the room temperature thermistor 9 and the room temperature thermistor 10 has a detected temperature that is equal to or higher than the predetermined temperature, the operation is continued with the detected temperature of the other room temperature thermistor that has not reached the predetermined temperature as the room temperature. Even if the thermistor is abnormal, the operation can be continued, and furthermore, by displaying an error message indicating that an abnormality has occurred on the room temperature thermistor side where the detected temperature is equal to or higher than the predetermined temperature, Or, the hot water tube 7 is in contact with one of the room temperature thermistors, or one of the room temperature thermistors is not close to the wall at a predetermined distance and is in an abnormal state where heat is trapped in the vicinity. Can be notified to the user.

  When the detected temperature of the room temperature thermistor 9 and the room temperature thermistor 10 is less than a predetermined temperature and the temperature difference between both the detected temperatures is not less than the predetermined temperature, the room temperature thermistor is not abnormal, but the hot water tube 7 is close to the room temperature thermistor. Or one room temperature thermistor side is not separated from the wall by a certain distance and is in close proximity, and heat is trapped in the surrounding area, and the installation status is displayed. By this, it can alert | report so that a user may confirm the condition of the hot water tube 7, and the distance with a wall.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Warm air blower outlet 5 Air inlet 7 Hot water tube 8 Connector 9 Room temperature thermistor 10 Room temperature thermistor

Claims (2)

A housing having an air inlet and a hot air outlet is provided with a blower fan and a heat exchanger, and the hot water heated by the heat source device passes through the heat exchanger from the connector via the hot water tube and is heated again. In a hot water heating apparatus that returns from a connector to a heat source device via a tube, and after the air sucked from the air suction port is heat-exchanged by a heat exchanger, the air is blown into the room from the hot air outlet by a blower fan. The room temperature thermistor that detects the room temperature is installed at least at both ends of the back of the housing , and when the detection temperatures detected by the room temperature thermistor are all below the predetermined temperature, the lowest detection temperature is adopted as the room temperature. A hot water heater characterized by comparing the set room temperature and performing operation so that the detected room temperature becomes the set room temperature . When all the detected temperatures of the room temperature thermistors are equal to or higher than a predetermined temperature, an error display of all the room temperature thermistors is displayed on the display unit and the operation is stopped, and the room temperature thermistors whose detected temperatures are higher than the predetermined temperature and room temperature thermistors lower than the predetermined temperature are stopped. when there is, performs an error display the detected temperature on the display unit is abnormal to room temperature thermistor side becomes equal to or higher than the predetermined temperature occurs, the detected temperature is adopted as the room temperature detected in the room thermistor lower than the predetermined temperature, the Comparing the adopted room temperature with the set room temperature set by the operation unit, the system is operated so that the detected room temperature becomes the set room temperature, and when the detected temperature of all the room temperature thermistors is less than the predetermined temperature, the difference between the detected temperatures is the predetermined temperature. 2. The hot water heater according to claim 1, wherein a confirmation display of the installation state is displayed on the display unit at the time described above.

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