JP2013066507A - Massage machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control difference in effective temperature in heating by a heater in a massage machine.SOLUTION: When a calf air bag 21, for example, is inflated, a sole is kept separated from the upper surface of a foot heater 35, so that the temperature (the effective temperature) of the sole is reduced relative to the temperature of the foot heater 35. On the contrary, when other air bags 22-24 are inflated, the distance between the sole and the upper surface of the foot heater 35 is reduced, so that the temperature (the effective temperature) of the sole relative to the temperature of the foot heater 35 becomes higher than when the calf air bag 21 is inflated. Accordingly, by setting a target temperature when the calf air bag 21 is inflated to be higher than a target temperature when the other air bags 22-24 are inflated, a difference in the effective temperature in heating by the foot heater 35 can be controlled. According to the invention, the state of the air bags 21-24 is recognized based on the state of a solenoid valve.

Description

  The present invention relates to a massage machine.

  2. Description of the Related Art Conventionally, there is a massage machine that performs massage such as pressing and compression on a user's treatment site by operating a treatment element and an airbag placed on a chair. In this type of massage machine, for example, there is one that incorporates a heater in a portion corresponding to the sole (see, for example, Patent Document 1). The circulation of the sole is promoted through the heating of the heater, and the effect of the massage is further enhanced. In the massage machine described in Patent Document 1, the temperature of the heater is changed for each treatment course.

JP 2007-31857 A

  In the massage machine, the position of the body changes due to the expansion or contraction of each airbag. For this reason, the distance between the human body and the heater varies depending on the state of each airbag. Accordingly, even if the heater temperature is set to the same temperature, the temperature sensed by heating the heater may not be constant due to the change in the distance. Further, even when the human body and the heater are in contact via a cover or the like, it is considered that the sensory temperature is not constant due to the contact pressure.

  This invention is made in view of such a situation, and the objective is to provide the massage machine which suppressed the difference in the sensory temperature by the heating of a heater.

  In order to solve the above-described problems, the massage machine of the present invention expands or contracts by a heater that heats the user's treatment site and the air that is supplied or exhausted, and massages the user's treatment site along with the expansion or contraction. And an air bag that defines the positional relationship between the heater and the human body, an air supply enabling state in which air can be supplied to the air bag, and an open air state in which air in the air bag can be discharged to the outside. A solenoid valve; a pump for supplying air to the airbag via the solenoid valve; and controlling the temperature of the heater; and when the solenoid valve is changed from the atmosphere open state to the air supply enabled state, The airbag is inflated by being driven, and in the inflated state, the electromagnetic valve is opened to the atmosphere so that the airbag is contracted. And parts, in massage machine wherein the control unit sets the temperature of the heater based on the state of the solenoid valve.

  In the above configuration, the heater is positioned to face the user's sole, and the airbag includes a first airbag that holds a calf from both sides when inflated, and the sole and the sole when inflated. A second airbag that reduces a distance between the heaters, and the control unit is in a state in which the solenoid valve corresponding to the first airbag can supply air, and the second airbag When the solenoid valve corresponding to the bag is in an open air state, the temperature of the heater is set to the first temperature, and the second valve is set regardless of the state of the solenoid valve corresponding to the first airbag. It is preferable that the temperature of the heater is set to a second temperature lower than the first temperature when the solenoid valve corresponding to the airbag is in an air supply enabled state.

  In the above configuration, the second airbag includes a foot-pressing airbag that presses the instep of the foot from above when inflated, and a foot-bottom air that presses the bottom of the foot from below in such a manner that the heater approaches the sole when inflating. And a bag.

  In the above configuration, the heater is built in a position where the palm of the armrest is placed, and the airbag is installed in a position corresponding to the arm of the armrest, and the palm is supported with the arm as a fulcrum when inflated. When the solenoid valve corresponding to the airbag is open to the atmosphere, the control unit sets the temperature of the heater to a first temperature and moves the electromagnetic valve corresponding to the airbag. When the valve is in an air supply enabled state, it is preferable that the temperature of the heater is set to a second temperature lower than the first temperature.

  ADVANTAGE OF THE INVENTION According to this invention, in the massage machine, the difference of the sensible temperature by the heating of a heater can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS (a) The side view which shows schematic structure of the massage machine in one Embodiment which concerns on this invention, (b) The front view which shows schematic structure of a massage machine. The block diagram which shows the electrical constitution of the massage machine of one Embodiment which concerns on this invention. The block diagram which shows the structure of the various solenoid valves of one Embodiment which concerns on this invention, and various airbags. The side view when (a) calf airbag of one embodiment concerning the present invention inflates. (B) Side view when the foot presser right airbag is inflated. (C) Side view when the foot bottom airbag is inflated. The timing chart which shows the operation timing of the air pump of one Embodiment which concerns on this invention, and various solenoid valves, and target temperature. Sectional drawing of the armrest provided with (a) arm airbag, palm airbag, and hand part heater in other embodiment which concerns on this invention, (b) Sectional drawing when the arm airbag of (a) swells.

Hereinafter, an embodiment embodying the massage machine of the present invention will be described with reference to FIGS.
First, the mechanical configuration of the massage machine will be described.

As shown in FIG. 1A, the massage machine 10 includes a seat part 12, a backrest part 13, and an ottoman 14.
The seat 12 is supported by the support leg 9. And the backrest part 13 is attached so that tilting with respect to the rear end (left end part in a figure) of the seat part 12 is possible. A reclining mechanism 16 that enables reclining (tilting) of the backrest 13 is provided below the seat 12.

  The ottoman 14 is a portion on which the leg portion and the foot portion are placed, and is attached to the front end (right end portion in the drawing) of the seat portion 12 so as to be tiltable. A vertical movement mechanism 17 that allows the ottoman 14 to move in the vertical direction is provided below the seat portion 12. In addition, armrest portions 15 extending in the front-rear direction are assembled on both the left and right sides of the seat portion 12.

  As shown in FIG.1 (b), the massage mechanism 18 which has the treatment element 18a is equipped in the center part of the backrest part 13 inside. The treatment element 18a performs a massage by performing an operation in the vertical width direction and a contact and separation operation with respect to the user's shoulder, back, and waist.

  In addition, a pair of shoulder airbags 19 are provided at positions corresponding to the user's shoulders in the backrest 13. A pair of waist airbags 20 is provided at positions corresponding to both sides of the waist in the backrest 13.

  The ottoman 14 is formed with a U-shaped accommodation groove 14a for accommodating the left and right legs of the user. The ottoman 14 includes a calf airbag 21, a foot presser right airbag 22, a foot presser left airbag 23, and a foot bottom airbag 24.

  The calf airbag 21 is housed in a position where the calf is sandwiched in each housing groove 14a. Further, the foot presser right airbag 22 is installed at a position corresponding to the right side of the back of the foot in each housing groove 14a. The foot presser left airbag 23 is installed at a position corresponding to the left side of the back of the foot in each housing groove 14a. The foot presser right airbag 22 and the foot presser left airbag 23 are inflated in such a manner that the foot is pressed down (to the foot bottom airbag 24 side). The foot bottom airbag 24 is internally provided at a position corresponding to the sole of each accommodation groove 14a. A foot heater 35 is provided on the upper side of the foot bottom airbag 24. In this example, a heating wire heater is employed as the foot heater 35.

Next, the electrical configuration of the massage machine will be described.
As shown in FIG. 2, the massage machine 10 includes a control circuit 11, an air pump 31, electromagnetic valves 32 a to 32 f, a foot heater 35, a treatment element driving unit 36, a reclining motor 16 a, and an ottoman motor. 17a and the operation part 40 are provided.

  The control circuit 11 is configured by a microcomputer and includes a nonvolatile memory 11a. The memory 11a stores a program relating to an automatic course in which massage is performed in a predetermined order, a table in which the state of the electromagnetic valve and the target temperature of the foot heater 35 are associated with each other.

The operation unit 40 includes a plurality of operation switches, and outputs an operation signal to that effect to the control circuit 11 when a specific switch is operated.
The control circuit 11 performs various operations based on operation signals from the operation unit 40. Hereinafter, various operations will be described. The control circuit 11 performs a massage operation by operating the treatment element 18a through the treatment element drive unit 36 including a plurality of motors. The treatment element drive unit 36 constitutes the massage mechanism 18.

  The control circuit 11 moves the ottoman 14 in the vertical direction through driving of the ottoman motor 17a. Further, the control circuit 11 reclines the backrest 13 through driving of the reclining motor 16a.

  The control circuit 11 increases the temperature of the foot heater 35 by energizing the foot heater 35. Here, the foot heater 35 includes a thermistor 35a. The thermistor 35 a detects the temperature of the foot heater 35 as a voltage value and outputs the detection result to the control circuit 11. The control circuit 11 recognizes the temperature of the foot heater 35 based on the detection result from the thermistor 35a. The control circuit 11 stops energizing the foot heater 35 when the recognized temperature is higher than the target temperature, and starts energizing the foot heater 35 when the recognized temperature is lower than the target temperature. continue. Thereby, the temperature of the foot heater 35 is controlled to the target temperature.

  The control circuit 11 expands or contracts the airbags 19 to 24 through the electromagnetic valves 32 a to 32 f and the air pump 31. As shown in FIG. 3, the air pump 31 is connected to the airbags 19 to 24 through a path 28. Specifically, in the path 28, one pipe connected to the air pump 31 branches in the middle and is connected to the airbags 19-24. The branched path 28 is provided with electromagnetic valves 32a to 32f corresponding to the airbags 19 to 24, respectively.

  In the energized state, the solenoid valves 32a to 32f are in an air supplyable state in which air from the air pump 31 can be supplied to the airbags 19 to 24. Further, the solenoid valves 32a to 32f are in an open state in which the air in the airbags 19 to 24 is exhausted to the atmosphere in a non-energized state.

Here, the inflating and deflating operations of the calf airbag 21 will be described as a representative.
When inflating the calf airbag 21, the control circuit 11 operates the air pump 31 and only energizes the solenoid valve 32c (a state in which air can be supplied). Thereby, the air from the air pump 31 is supplied to the calf airbag 21 through the electromagnetic valve 32c. Thereby, the calf airbag 21 is inflated. Then, after a predetermined time has elapsed, the control circuit 11 brings the solenoid valve 32c into a non-energized state (atmospheric release state). Thereby, the air in the calf airbag 21 is exhausted into the atmosphere through the electromagnetic valve 32c. For this reason, the calf airbag 21 contracts. The same applies to other airbags. It is also possible to inflate a plurality of airbags simultaneously by energizing the plurality of solenoid valves. By repeating the inflation and deflation operations of the airbags 19 to 24, massage with the airbag is performed.

  Next, the temperature setting of the foot heater 35 when any of the calf airbag 21, the foot presser right airbag 22 and the foot bottom airbag 24 in the ottoman 14 is inflated is shown in FIGS. Will be described with reference to FIG.

  As shown in FIG. 4A, when the calf airbag 21 is inflated, the calf airbag 21 holds the user's calf from both sides. Accordingly, the upper surface of the foot heater 35 and the sole are kept apart. In this state, the heat from the foot heater 35 is easily released into the air, and the temperature of the sole of the foot relative to the temperature of the foot heater 35 (body temperature) becomes low. Accordingly, the target temperature in the foot heater 35 is set to a higher 45 ° C. in anticipation of the heat release. That is, based on the table stored in the memory 11a, the control circuit 11 controls the temperature of the foot heater 35 to 45 ° C. based on the temperature detected by the thermistor 35a when only the solenoid valve 32c is energized. Do.

  As shown in FIG. 4B, when the foot presser right airbag 22 is inflated, the right side of the instep is pressed downward. Accordingly, the upper surface and the sole of the foot heater 35 are brought close to each other and eventually come into contact with each other via a cover or the like covering the massage machine 10. For this reason, the temperature of the sole with respect to the temperature of the foot heater 35 is higher than that when the calf airbag 21 is inflated. Therefore, the target temperature of the foot heater 35 is set to 37 ° C., which is lower than that when the calf airbag 21 is inflated. That is, based on the table stored in the memory 11a, the control circuit 11 performs temperature control for setting the foot heater 35 to 37 ° C. based on the detection result of the thermistor 35a when the solenoid valve 32d is energized.

  As shown in FIG. 4 (c), when the foot bottom airbag 24 is inflated, the foot heater 35 approaches the sole of the foot and eventually contacts via the cover or the like. For this reason, the temperature of the sole with respect to the temperature of the foot heater 35 is higher than that when the calf airbag 21 is inflated.

  Here, each target temperature is the distance between the upper surface of the foot heater 35 and the sole when the airbag is inflated, and when the upper surface of the foot heater 35 and the sole are in contact via a cover or the like. Based on the contact area, the contact pressure, and the like, the sensible temperature is set to be constant. Specifically, the smaller the distance between the upper surface of the foot heater 35 and the sole, the larger the contact area and the contact pressure when the upper surface of the foot heater 35 and the sole are in contact via a cover or the like. The target temperature is set low. The distance between the upper surface of the foot heater 35 and the sole, the contact area and the contact pressure corresponding to the state of each of the airbags 21 to 24 can be obtained through experiments. Each target temperature is calculated based on the distance between the upper surface and the sole of the foot heater 35 obtained in this experiment, and the target temperature is stored in the table.

  In the configuration of the foot presser right airbag 22, the foot heater 35, and the foot bottom airbag 24 of this example, the contact area and the contact pressure when the foot bottom airbag 24 is expanded are the same as those when the foot presser right airbag 22 is expanded. Smaller than them. Accordingly, the target temperature when the foot bottom airbag 24 is inflated is set to 40 ° C., which is lower than when the calf airbag 21 is inflated and higher than when the foot presser right airbag 22 is inflated.

  Based on the table stored in the memory 11a, the control circuit 11 performs temperature control for setting the foot heater 35 to 40 ° C. based on the detection result of the thermistor 35a when the solenoid valve 32f is energized.

The target temperature is also set to 40 ° C. when the calf airbag 21 is inflated together with the foot bottom airbag 24.
Further, depending on the configuration of the foot presser right airbag 22 and the like, the contact area and the contact pressure are reversed, and the target temperature when the foot bottom airbag 24 is expanded is set lower than that when the foot presser right airbag 22 is expanded. Sometimes it is done.

  In the above example, the case where the foot presser right airbag 22 is inflated has been described, but the same applies to the case where the foot presser left airbag 23 is inflated. When both the foot presser right airbag 22 and the foot presser left airbag 23 are inflated, in this example, the target temperature is set to 35 ° C., which is lower than when the foot presser right airbag 22 alone is inflated. This is because when both the foot presser right airbag 22 and the foot presser left airbag 23 are inflated, the sole contacts the foot heater 35 with a larger contact area and contact pressure.

  Finally, the states of the air pump 31 and the electromagnetic valves 32c to 32f and the target temperature at that time will be described with reference to the timing chart of FIG. The control in the figure is, for example, a part of an automatic course stored in the memory 11a.

  The control circuit 11 inflates the calf airbag 21 by turning on the air pump 31 and sending air to the path 28 while energizing the electromagnetic valve 32c (a state in which air can be supplied). When recognizing that the solenoid valve 32c is in the energized state, the control circuit 11 sets the target temperature to 45 ° C. and controls the foot heater 35 to 45 ° C.

  After maintaining the state for a certain time, the control circuit 11 further inflates the foot bottom airbag 24 by setting the solenoid valve 32f to an energized state (a state in which air can be supplied). When recognizing that the solenoid valve 32f is in the energized state, the control circuit 11 sets the target temperature to 40 ° C. and controls the foot heater 35 to 40 ° C.

  The control circuit 11 puts the solenoid valves 32c and 32f into a non-energized state (atmospheric release state) and turns off the operation of the air pump 31 after a predetermined time has elapsed. Thereby, the calf airbag 21 and the foot bottom airbag 24 contract. Thereafter, the control circuit 11 puts the electromagnetic valve 32d into an energized state (a state in which air can be supplied), and turns on the air pump 31 to send air to the path 28 to inflate the foot presser right airbag 22. When recognizing that the solenoid valve 32d is in the energized state, the control circuit 11 sets the target temperature to 37 ° C. and controls the foot heater 35 to 37 ° C.

  The control circuit 11 puts the solenoid valve 32d into a non-energized state (atmospheric release state) after a predetermined time has elapsed. Thereby, the foot presser right airbag 22 contracts. At the same time, the control circuit 11 inflates the foot presser left airbag 23 by putting the solenoid valve 32e in an energized state (a state in which air can be supplied). When the control circuit 11 recognizes that the solenoid valve 32e is in the energized state, it maintains the target temperature at 37 ° C.

  The control circuit 11 maintains the state for a certain period of time, and then further inflates the foot presser right airbag 22 by energizing the electromagnetic valve 32d (a state in which air can be supplied). When recognizing that the electromagnetic valves 32d and 32e are in the energized state, the control circuit 11 sets the target temperature to 35 ° C. and controls the foot heater 35 to 35 ° C. The control circuit 11 puts the solenoid valves 32d and 32e in a non-energized state (atmospheric release state) and turns off the operation of the air pump 31 after a certain time has elapsed. Thus, the process in FIG. 5 ends.

  In this example, the calf airbag 21 corresponds to a first airbag, and the foot presser right airbag 22, the foot presser left airbag 23, and the foot bottom airbag 24 correspond to a second airbag. The target temperature when the calf airbag 21 is expanded corresponds to the first temperature, and the target temperature when the airbags 22 to 24 are expanded corresponds to the second temperature.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) Based on the states of the airbags 21 to 24, the target temperature is set by paying attention to the change in the distance between the upper surface of the foot heater 35 and the sole. The target temperature is a contact area when the upper surface of the foot heater 35 and the sole are in contact via a cover or the like as the distance between the upper surface of the foot heater 35 and the sole is increased when the airbag is inflated. In addition, the smaller the contact pressure, the higher it is set. The distance between the upper surface of the foot heater 35 and the sole, the contact area, and the contact pressure according to the state of each airbag 21 to 24 are obtained through experiments, and the target temperature can be determined from the experiment results. Thereby, regardless of the airbag that is inflated, the difference in the temperature of the sensation through the heating of the foot heater 35 can be suppressed.

In the present invention, the states of the airbags 21 to 24 are recognized based on the states of the electromagnetic valves 32c to 32f. Accordingly, the above-described effects can be achieved with simple control.
(2) When the calf airbag 21 is inflated, the calf is held by the calf airbag 21 from both sides. Therefore, since the upper surface of the foot heater 35 and the sole are kept apart, the temperature of the sole (sensation temperature) with respect to the temperature of the foot heater 35 is lowered. On the other hand, when the other airbags 22 to 24 are inflated, the upper surface of the foot heater 35 and the sole are in contact with each other through an approach or a cover. The temperature of the sole of the foot relative to the temperature (sensible temperature) increases. Therefore, by setting the target temperature when the calf airbag 21 is inflated to be higher than the target temperature when the other airbags 22 to 24 are inflated, the difference in the sensory temperature through the heating of the foot heater 35 can be suppressed.

(3) When the other airbags 22 to 24 are inflated, the soles are prevented from being heated more than necessary. Therefore, useless power consumption related to heating of the foot heater 35 can be suppressed.
In addition, the said embodiment can be implemented with the following forms which changed this suitably.

  In the above embodiment, the foot heater 35 is a heating wire heater. However, the foot heater 35 is not limited to this as long as it can heat the sole of the user, and may be a PCT (Positive Temperature Coefficient) heater or an infrared heater. Good. In the case of a PCT heater, the foot heater 35 can be set to the target temperature more quickly.

  In the above embodiment, the thermistor 35a is employed as the temperature sensor. However, the temperature sensor is not limited to this as long as the temperature of the heater can be detected. For example, even a thermocouple or a platinum temperature sensor is used. Good.

  In the above embodiment, an airbag may be provided in each armrest portion 15. Specifically, as shown in FIG. 6A, both armrests 15 are equipped with arm airbags 51 corresponding to the arms and palm airbags 52 corresponding to the palms. A hand heater 53 is provided on the upper side of the palm airbag 52. The hand heater 53 is configured similarly to the foot heater 35.

  Here, it is assumed that the hand heater 53 is set to a specific target temperature when the arm airbag 51 and the palm airbag 52 are in the contracted state. As shown in FIG. 6B, when the arm airbag 51 is inflated, the arm is lifted upward. As a result, the palm contacts the hand heater 53 via a cover or the like. Accordingly, the target temperature when the arm airbag 51 is inflated is set lower than the specific target temperature. In this configuration, the palm airbag 52 may be omitted.

  Even when the palm airbag 52 is inflated, the hand heater 53 contacts the palm via a cover or the like. Therefore, the target temperature when the palm airbag 52 is inflated is set lower than the specific target temperature. Also in this example, the states of the arm airbag 51 and the palm airbag 52 are recognized based on the states of the electromagnetic valves corresponding to the airbags 51 and 52.

  In the above embodiment, the target temperature may be set in consideration of the change in the distance between the sole and the foot heater 35 depending on the reclining position of the backrest 13 and the vertical position of the ottoman 14. .

  In the above embodiment, when all of the airbags 21 to 24 are in the contracted state, it is assumed that the sole and the foot heater 35 are separated from each other, and the same target temperature (for example, 45 ° C.) as that when the calf airbag 21 is inflated. May be set.

  In the above embodiment, the target temperature is set based on the state of each airbag 21-24. However, the target temperature may be set noting a plurality of airbags but focusing on one airbag. For example, the target temperature may be set low when the foot bottom airbag 24 is inflated, and the target temperature may be set high when the foot bottom airbag 24 is contracted. In this case, other airbags may be omitted.

  In the above embodiment, the solenoid valve is in a state where air can be supplied in the energized state and is open to the atmosphere in the non-energized state. Thus, the solenoid valve may be in a state where air can be supplied in the non-energized state.

Next, the technical idea that can be grasped from the embodiment will be described together with the effects.
(B) The massage machine according to any one of claims 1 to 4, further comprising a temperature sensor that detects a temperature of the heater, wherein the controller is configured to detect a temperature of the heater based on a detection result of the temperature sensor. A massage machine that controls the set target temperature.

  DESCRIPTION OF SYMBOLS 10 ... Massage machine, 11 ... Control circuit (control part), 14 ... Ottoman, 15 ... Armrest part, 19 ... Outer shoulder airbag, 20 ... Waist airbag, 21 ... Calf airbag, 22 ... Foot press right airbag, 23 ... Foot presser left airbag, 24 ... Foot bottom airbag, 31 ... Air pump, 32a to 32f ... Solenoid valve, 35 ... Foot heater, 35a ... Thermistor, 51 ... Arm airbag, 52 ... Palm airbag, 53 ... Hand heater.

Claims (4)

A heater for heating the user's treatment site;
An airbag that inflates or contracts by air supplied or exhausted, massages a user's treatment site with the expansion or contraction, and defines the positional relationship between the heater and the human body;
A solenoid valve that switches between an air supply enabled state capable of supplying air to the airbag and an atmosphere open state capable of releasing the air in the airbag to the outside;
A pump for supplying air to the airbag via the solenoid valve;
The temperature of the heater is controlled, and the air bag is inflated by driving the pump when the solenoid valve is changed from the atmosphere open state to the air supply enabled state, and the solenoid valve is inflated in the inflated state. In a massage machine provided with a control unit that contracts the airbag by opening it,
The said control part sets the temperature of the said heater based on the state of the said electromagnetic valve, The massage machine characterized by the above-mentioned. The massage machine according to claim 1,
The heater is located opposite the user's sole,
The airbag has a first airbag that holds a calf from both sides when inflated, and a second airbag that reduces the distance between the sole and the heater when inflated,
The controller controls the temperature of the heater when the solenoid valve corresponding to the first airbag is in an air supply enabled state and the solenoid valve corresponding to the second airbag is open to the atmosphere. Is set to the first temperature,
Regardless of the state of the solenoid valve corresponding to the first airbag, when the solenoid valve corresponding to the second airbag is in a state where air can be supplied, the temperature of the heater is set higher than the first temperature. A massage machine characterized by setting to a low second temperature. The massage machine according to claim 2,
The second airbag is composed of a foot-pressing airbag that pushes the instep of the foot from above when inflated, and a foot-bottom airbag that pushes the sole from below in a manner that causes the heater to approach the sole when inflating. A massage machine. The massage machine according to claim 1,
The heater is built in the position where the palm in the armrest is placed,
The airbag is mounted at a position corresponding to the arm in the armrest, and at the time of inflation, the palm is displaced to the heater side with the arm as a fulcrum,
The controller sets the temperature of the heater to a first temperature when the solenoid valve corresponding to the airbag is open to the atmosphere, so that the solenoid valve corresponding to the airbag can be supplied with air. When there is a massage machine, the temperature of the heater is set to a second temperature lower than the first temperature.

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