JPH0623630B2 - Cools cooling unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention does not include an operator or an air conditioner engaged in various works, especially in a work gondola at a high place under severe conditions such as heat and heat. The present invention relates to a cooling unit of a cool suit for protecting a driver or the like of a work or competition vehicle.

For work under severe conditions such as heat and heat, a gondola of a work vehicle with a ladder used for construction or maintenance of overhead transmission and distribution lines in the summer, installation / installation or replacement of power transmission and distribution related equipment, repairs, etc. Examples include work on the top, various towers, hills, and operation of vehicles for work in the hot sun for a long time in the hot sun, and operation and operation in the driver's seat of a competition vehicle that cannot afford a cooling machine.

[Conventional technology]

The work under the intense heat and heat as described above is extremely harsh, and the mental and physical fatigue of the worker is apt to occur, resulting in a decrease in work efficiency. Accidents related to human life such as electric shocks, crashes, and inadvertent injuries tend to occur.
One of the conventional techniques for preventing the heat and health of workers in such a harsh working environment is the cooling clothing system disclosed in Japanese Patent Laid-Open No. 59-530704. This air-conditioning system is
Cooling equipment that normally has a valve port closed with a valve body and has a soft tube having a continuous cavity into which a refrigerant sol can be injected is attached to the entire inner surface, and a cooling device that creates a refrigerant sol in which frozen refrigerant fine particles float in the liquid. And a cooling refrigerant sol storage tank, and a hose that can be connected to the pipe connected to this cooling refrigerant sol storage tank and the valve opening of the cooling clothes, and automatically injects only the necessary amount of the cooling refrigerant sol into the cooling clothes. It consists of a pump with a controller for.

This cooling refrigerant sol is obtained by encapsulating frozen refrigerant fine particles or a refrigerant in a liquid in a large number of non-melting microcapsules and suspending it, and filling the refrigerant sol into a soft tube of the cooling clothes, When the refrigerant is completely melted, it is extracted and refilled with a pump by the refrigerant sol in the storage tank cooled by the cooling device. Since the frozen sol of particles of frozen particles and capsules are suspended in this refrigerant sol, a large pump that does not impair the opening and closing function of the piston pump without impairing its open / close function and the electric motor that drives it Need. Further, the vertical tube and the horizontal tube attached to the entire surface of the cooling garment constituted by the soft tube require a corresponding storage volume to perform the function of cooling for a desired time, and prevent the refrigerant sol from being clogged. Because it requires a sufficient cross-sectional area,
Overall, the cooling garment becomes thick and large, thus impairing work activities.

Further, there is a drawback that there is no means for controlling the temperature inside the cooling clothes between the time when the refrigerant sol is filled with the soft tube of the cooling clothes and the temperature of the refrigerant sol is raised and the refrigerant sol is exchanged.

Further, as another example of the prior art, there is a clothing temperature adjusting device disclosed in JP-A-60-153858. In this device, a clothing is provided with a conductive pipe having flexibility and a property of shrinking when cooled, a conductor is passed through the pipe, and the conductor and the inner peripheral surface of the pipe are provided at appropriate intervals. A non-conductive spacer having a flow hole is disposed in the pipe, a refrigerant supply device with an opening / closing valve for supplying a refrigerant into the pipe is provided, and the opening / closing valve is opened based on an input signal from a temperature sensor provided on the clothes. A temperature controller that opens and closes appropriately is provided, and a battery that allows current to flow is provided between the pipe and the lead wire. This device is a clothing temperature control device for both warm and cold. For this reason, the inside of the flexible and conductive pipe is complicated and its cross-sectional area is large. Therefore, the clothing itself inevitably becomes thick and large in size, resulting in poor workability and activity. . Since the refrigerant is supplied from a cylinder filled with an inert gas such as _Co2 and is dissipated into the atmosphere through the clothes, it is necessary to always prepare a spare cylinder to replenish it. There is inconvenience.

Further, as still another conventional technique, a large air blowing system blows cold air into the cooling clothes to dissipate the air into the atmosphere. For example, the cooling coat disclosed in Japanese Utility Model Laid-Open No. 60-105608 and fire extinguishing work. There is a heat-resistant clothing for fire fighting that is worn when engaging in this work.This heat-insulating clothing is to circulate piping inside, for example, to send cooling air to exchange heat, but to cool it, but the piping diameter is large and the clothing itself is also large. Therefore, it is difficult to use it under the condition that the scaffolding is unfavorable as described above, and it is expected to be dangerous. Furthermore, if it is attempted to give the air piping flexibility and improve its motility, it will impede the flow of air when it is bent and the air inside the piping will be applied, resulting in a large operating unit including the pump device. Therefore, it was unsuitable for the above work.

[Problems to be solved by the invention]

INDUSTRIAL APPLICABILITY The present invention is applied to a cool suit that alleviates severe working conditions under the hot environment as described above, and obtains comfortable, healthy, and light workability in a very short walking distance or almost fixed position. Ice, more easily available and replenished, with the aim of providing a cooling unit that should
For example, not only ice from an ice factory, but also ice produced by an ice-maker in a home refrigerator, commercially available ice cubes (dia ice), etc. can be used, and small size and temperature control can be performed using an electromagnetic pump. The object is to provide a cooling unit for a cool suit that is adaptable.

[Structure for solving problems]

A cooling unit for a cool suit according to the present invention has a configuration according to the claims, that is, an electromagnetic pump that sucks a cooling liquid in a cool container and pressure-feeds it to the cool suit through an inflow pipe, and this electromagnetic pump. A flow rate adjusting valve connected to the discharge side for opening and closing the discharge pipe and for roughly adjusting the flow rate, and for controlling the temperature in the cool suit by finely adjusting the flow rate of the cooling liquid, the electromagnetic A pulse current control device for energizing an electromagnetic coil of a pump is provided to achieve the above-mentioned object.

[Operation of the invention]

The cooling unit for a cool suit according to the present invention stores ice water or cooling water cooled by a cooling device in a water tank and sends the cooling water under pressure to an inflow pipe of the cool suit. The cooling water that circulates through the flexible cooling pipe in the cool suit flows back to the cooling unit of the cool suit from the outflow pipe. During that time, the heat inside the cool suit is taken away, and the body heat is taken away by touching the skin of the wearer through the clothing of the cool suit of Hiike, and the body temperature of the wearer is appropriately maintained. Therefore, in this case, the amount of pumping and circulation of the cooling water is automatically controlled so that the inside of the cool suit has an appropriate temperature in consideration of the place of use, the ambient temperature, the amount of exercise, the taste of the wearer, and the like. Also, by having multiple cooling systems for the cool suit,
The cooling condition can be adjusted widely and effectively. Since this flexible cooling tube is soft and has an outer diameter of about several millimeters, the cool suit can be made very thin, so there is no fear of impairing workability.

Since the target cool suit and the cooling unit of the cool suit can be connected with a flexible connecting tube of an appropriate length, movement within the range of the connecting tube is not hindered and workability is improved. Does not fall. In addition, the cooling unit of the cool suit is originally a portable type, so it can be installed near the work place.
There is no problem not only when using on an automatic moving device such as a gondola and on the driver's seat of the vehicle, but also when using on a normal scaffold. Although cooling water is used as the cooling medium, since cooling water is incompressible as is well known, even if bending of the flexible connecting pipe occurs, the cooling water immediately returns to its original shape and impairs fluidity. Moreover, the cool suit itself can be downsized, and workability is not impaired as described above.

[Explanation of Examples]

Hereinafter, a cooling unit for a cool suit according to the present invention will be disclosed with reference to the accompanying drawings of the embodiments.

FIG. 1 shows a cooling unit 1 for a cool suit according to the present invention.
FIG. 3 is a partially cutaway perspective view showing the configuration of FIG.

The outside of the unit can be mainly composed of a hard alloy resin having sufficient elasticity and strength. On the left side of the drawing is a tank 2, which can be closed by a lid 3. This tank 2
A heat insulating layer 6 is disposed between the outer shell 4 and the inner shell 5. The heat insulating layer 6 can be formed by filling a urethane heat insulating material or forming a vacuum layer, and further by combining both.

A bottom plug 7 is provided at the bottom of the tank 2 so that it can be drained. The lid 3 is provided with a handle 8 for moving the unit and a thermometer 9 for measuring the water temperature. The tank 2 and the lid 3 maintain the cold insulation container 14 in an airtight state by a hinge (not shown) on the back side of the drawing and a clasp 10.

As shown on the right side of the figure, a control box 11 is arranged. A control panel 12 is formed on the surface of the control box, and an electromagnetic pump 15 controlled by the control panel is provided inside. The control panel 12 includes a flow rate adjusting valve 16 for opening and closing the discharge fluid of the electromagnetic pump 15 and for roughly adjusting the flow rate, a joint for a suction pipe 18 for sucking cold water from the cold insulation container 14, a power switch (SW) 22, An indicator lamp 23 and cold water discharge side connection fittings 24, 24 'are provided. The suction side of the electromagnetic pump 15 is connected to the suction joint 49 with a pipe 19
Are connected. The discharge side pipe 20 connected to the discharge joint 50 of the electromagnetic pump 15 reaches the distributor 17 via the main body of the flow rate adjusting valve 16. Cold water discharge side connection fittings 24, 24 ′ are connected to the distributor 17.

Return-side connecting fittings 25 and 25 'are connected to the cold insulation container, and in consideration of convenience for moving the cooling unit 1, a belt loop 1 for attaching a shoulder belt is provided.
3 is formed. Appropriate positions can be selected for these mounting positions in consideration of the overall shape and practical convenience. A filter 21 is arranged at the inner end of the cold insulating container 14 of the suction pipe 18.

By the way, the flow rate adjusting valve 16 is liable to be clogged with ice pieces or fine contaminants floating in the cooling liquid, and may cause unstable flow rate fluctuations. However, the opening degree of the faucet cock of the water supply should be kept within a range that is roughly adjusted.

FIG. 2 is an external perspective view showing an example of a cool suit in which the cooling unit 1 of the cool suit according to the present invention shown in FIG. 1 is used. The cool suit 31 is configured as a hood with a hood, but it goes without saying that other configurations can be adopted.

According to the figure, the outer material 32 is knitted and breathable in a mesh shape.
In the same manner, a flexible cooling pipe 37 is looped around the inside and thinly sewn with a woven gauze lining 33 which is also highly breathable. This flexible cooling pipe 37
Is a soft synthetic resin tube suitable for the purpose of not impairing the workability of the suit wearer, and having resilience to deformation, elasticity, thermal conductivity, etc.
Plastic tubing such as vinyl tubing can be used. These flexible cooling pipes 37 may be of a plurality of systems, and each end of these flexible cooling pipes 37 is connected to an inflow side branch joint 36 and an outflow side branch joint 36 ′, and similarly flexible inflow pipe 34 and It is connected to the outflow pipe 35. It is desirable that the inflow pipe 34 and the outflow pipe 35 be covered with a heat insulating material.

The left and right sides of the cool suit 31 are configured so that they can be joined together by fasteners or velcro.

The inflow pipe 34 and the outflow pipe 35 of the cool suit 31 configured as described above communicate with each other through the branch joints 36 and 36 ′ and the flexible cooling pipe 37. The branch joint 36 may be provided with a cock for each system, or a plurality of inflow pipes 34 and thereafter may be configured to increase or decrease the number of effective operating systems, thereby adjusting the amount of heat taken from the wearer. .

When the cool suit 31 is used, the discharge side connecting fitting 24 or 24 'of the cooling unit 1 of the cool suit according to the present invention shown in FIG.
Or 25 'and the inflow pipe 3 of the cool suit 31 respectively
4 and the outflow pipe 35 are connected by a flexible connecting tube. Although not shown, this flexible connecting tube is made of a synthetic resin tube such as a vinyl tube, and the surface of which is heat-insulated is used as an appropriate length. Inflow and outflow tubes are one set,
A suitable length and type are selected depending on the type of work, work position, work state, and the like. The cooling unit of the cool suit is provided with two sets of connection fittings in consideration of the use of two sets of cool suits, and it goes without saying that a fitting other than two sets can be used.

FIG. 3 is an actual longitudinal sectional view showing an example of an extremely miniaturized electromagnetic pump 15 used in the cooling unit 1 of the cool suit according to the present invention.

A cylinder 41 is provided in a vertical through hole on the axial center of the electromagnetic coil 40, and an annular magnetic pole 42 and an annular magnetic path 43 are provided above and below the cylinder 41 except near the center thereof. The cylinder 41 is a non-magnetic material, and the annular magnetic pole 42 and the annular magnetic path 43 are ferromagnetic materials. The cylinder 41 is pressure-supported by a return spring 44 and an auxiliary spring 45 and is fitted in the cylinder 41 so as to be slidable.
An electromagnetic plunger 47 having a built-in is arranged. A suction joint 49 is provided on the side of the auxiliary spring 45 that supports the electromagnetic plunger 47.
However, on the return spring side, the discharge joint 5 is passed through the discharge valve 48.
0 is arranged respectively. The suction joint 49 to the discharge joint 50 are kept airtight, and the liquid is sucked in from the suction inlet 51 of the suction joint as shown by the arrow, and passes through the electromagnetic pump from the discharge outlet 52 of the discharge joint as shown by the arrow. Is discharged.

FIG. 4 shows a circuit for driving an electromagnetic pump with a commercial power source, and shows only the electromagnetic coil 40 of the pump of FIG. In the figure, when a voltage obtained by half-wave rectifying the commercial AC power source E via the switch SW and the diode D ₁ is applied to the electromagnetic coil 40, a pulsed current flows and is energized in the electromagnetic coil 40 every half cycle. The electromagnetic pump utilizes the intermittent magnetic attraction force that moves the electromagnetic plunger 47 upward in FIG. 3 while the electromagnetic coil 40 is energized and the repulsive force of the return spring 44 while deenergized. The pump action generated by reciprocating the inside of the cylinder 41 is utilized.

When the switch (SW) 22 on the control panel of the cooling unit of the cool suit shown in FIG. 1 is turned on and a pulsed current is supplied to the electromagnetic coil 40 of the electromagnetic pump 15, the electromagnetic pump operates and the liquid in the cold container is cooled. Is pumped to the discharge side connection fitting 24. Discharge side connection fitting 24 and return side connection fitting 2
5 and the inflow pipe 34 and the outflow pipe 35 of the cool suit 31 of FIG. 2 are connected by a flexible connecting tube, the cooling liquid circulates from the cool container 14 into the cool suit and then again. Return to. The cooling liquid is a cool container 14
With the water inside, the ice block is cooled as it is or by putting it in an ice bag, and is filtered by the filter 21 and the suction pipe 18 and the pipe 1
9 into the electromagnetic pump through the suction port 51. The cooling liquid pressurized by the pumping action of the electromagnetic pump 15 exits the discharge port 52, passes through the flexible connecting tube (not shown), and flows from the inflow pipe 34 of the cool suit 31 to the cooling pipe 37 of the cool suit. Circulate inside. The cooling liquid that has absorbed heat while circulating in the cool suit reaches the return side connection fitting 25 from the outflow pipe 35 through the flexible connecting tube (not shown) and returns to the inside of the cold insulation container 14. During the circulation of the cooling liquid, the excess body temperature of the wearer is deprived to control the body temperature. In addition, the discharge side connection fitting 24 and the return side connection fitting 2
No. 5 is a connection tool with a built-in valve that is automatically opened while the tubes are connected and closed in other cases, so even if one cool suit is used It doesn't matter. As the cooling liquid, pure water can be used or an antifreezing liquid can be mixed.

Incidentally, in the electromagnetic pump 15 used in the cooling unit of the cool suit according to the present invention, since the liquid flowing in the pump is at a low temperature, the heat of the electromagnetic coil 40 is constantly cooled, and the resistance of the winding is small. Therefore, the number of turns can be reduced, and therefore the coil itself as well as the type E or the type B or less can be used and the type A insulation can be used. Therefore, the electromagnetic pump can be made smaller than usual. can do.

The degree of heat absorption of the cool suit operated by the cooling unit of the cool suit according to the present invention is controlled so that the temperature inside the cool suit 31 does not make the wearer feel uncomfortable. This temperature is about 36.5 ° C. in a range where it does not feel cold by touching the skin, although it varies depending on the use atmosphere or work type. Such temperature adjustment is generally performed by controlling the flow rate by the electromagnetic pump 15, but the temperature of the cooling liquid in the cool container 14 and the electromagnetic coil 4 are generally controlled.
It should be controlled to the optimum state in consideration of the heat generation of 0.

The flow rate control of the electromagnetic pump 15 is performed mechanically by roughly adjusting the flow rate control valve 16 which also functions as opening and closing in FIG. 1 within a range in which fluctuation instability of the flow rate due to the clogging of the valve portion does not occur. Can be, but further electromagnetic coil 4
By controlling the intermittent current supplied to 0, the temperature control is performed by finely adjusting the flow rate corresponding to the temperature change of the cool suit. The control of the intermittent current applied to the electromagnetic coil can be most simply performed by connecting the variable resistor VR connected in series between the diode D ₁ and the electromagnetic coil 40 as shown in FIG. The technical background is apparent in Japanese Utility Model Publication No. 41-18863 of the present applicant.

Further, as shown in FIG. 6, it can be implemented by an AC half-wave phase control circuit 26A connected to the electromagnetic coil 40. Such an AC half-wave phase control circuit 26A can be implemented by the technique disclosed in Japanese Utility Model Laid-Open No. 60-14171, which is also the present applicant.

Further, in FIG. 7, in consideration of the situation where the AC power source is hard to obtain, the DC power source from the DC power source B is converted into a pulse current by the control circuit 26D including the oscillation circuit,
This shows a configuration in which the electromagnetic coil 40 is energized by this pulse current. In this case, the flow rate is controlled by changing the cycle of the pulse current or the energization time for each cycle, or by using both of them together.

Although FIG. 7 shows a configuration in which the storage battery B is used as the DC power supply, a DC current obtained by rectifying the AC power supply can be used. Circuits for this purpose are disclosed in Japanese Utility Model Publication No. 59-41377 and Japanese Utility Model Publication No. 56-94874.
It will be disclosed in the publication.

In FIG. 8, the commercial AC power source E and the DC power source B are switched and used by the switches SW ₁ , SW ₁ ′ and SW ₂ , SW ₂ ′. Commercial AC power supply E and DC power supply B
The operation of and is a combination of the operations of the circuits described above. However, since the normal voltage of the DC power supply B is often lower than the voltage of the commercial AC power source E, when so adapt the voltage of the intermediate tap T ₂ provided to the electromagnetic coil 40 ',
No need to use heavy weight transformers. Depending on the conditions, it is possible to use a coil of the same number of turns with a low voltage through a small transformer. In addition, the switch SW ₁ ,
SW ₁ ′ and SW ₂ , SW ₂ ′ can be configured as the same switch or a set of switches.

As described above, by changing the driving power source of the electromagnetic pump to alternating current, direct current, and alternating current / direct current, the condition regarding the place of use is relaxed, and it can be used in a wide range. For example, in the case of maintenance or construction of a distribution line, if a commercial power source exists nearby, it can be used, and if the commercial power source cannot be used, a portable DC power source can be used. An example of such a portable DC power source is a vehicle-mounted storage battery. In the case of an on-vehicle storage battery, the work duration is usually about 2 hours, so it is possible to operate the engine of the automobile or charge a spare storage battery in the meantime with a small engine generator for replacement. . Also, during work breaks, the storage battery used can be taken down and rapidly charged for repeated use. Incidentally, the power consumption of the electromagnetic pump in this embodiment is about 20 watts, although it varies slightly depending on the discharge flow rate.

The same reference numerals in each reference numeral in FIGS. 4 to 8 indicate the same members.

In addition, as described above, it is more preferable to automatically control the pressure feed / circulation amount of the cooling water in consideration of the place of use, the ambient temperature, the amount of exercise, the preference of the wearer, and the like. Such automatic control is
By implementing a heat-sensitive part with a thermistor or other element inside the cool suit or in the cooling water, and applying the output to the above-mentioned control circuit and performing feedback control so that a temperature within a predetermined range can be obtained as a control input. You can

Such automatic control is disclosed, for example, in Japanese Patent Publication No. 57-57, which the applicant of the present invention has previously disclosed regarding passage flow rate control of an electromagnetic pump.
By applying the technology described in Japanese Patent Publication No. 12864 and Japanese Patent Publication No. 61-5048, the flow rate of cooling water by an electromagnetic pump can be automatically controlled so as to maintain the temperature inside the cool suit at a predetermined value. . However, the control circuits in these prior arts use a thermistor that changes the resistance value with a negative characteristic with respect to the change in temperature to be controlled. That is, when the temperature to be controlled rises above a predetermined value, the resistance value decreases in order to reduce the combustion amount, that is, the supply of the fuel oil amount by the electromagnetic pump,
On the contrary, if the temperature to be controlled falls below the specified value,
In order to increase the supply of fuel oil quantity by the electromagnetic pump,
It uses a thermistor whose resistance increases.

On the other hand, in the cool suit according to the present invention, when the temperature inside the cool suit is increased, the cooling water flow rate is increased, and when the temperature is too low, the cooling water flow rate is increased. Need to be reduced. in this way,
It is necessary that the temperature to be controlled and the resistance value of the temperature detection unit for controlling the flow rate of the electromagnetic pump have a positive relationship. Therefore, when the temperature is detected using a posistor having a positive temperature-resistance value, or when a conventional thermistor showing a negative characteristic with respect to the detected temperature is used, a means for inverting the characteristic is also used. do it.

FIG. 9 shows another embodiment of the cooling unit for the cool suit according to the present invention, and is a structural explanatory view by partial fracture. In this embodiment, a cooler 28 is integrally assembled below the cold insulation container 14 'so as to be portable.

The cooler 28 operates in a cooling cycle in which a refrigerant such as freon is compressed, condensed, expanded, and evaporated, and an electromagnetic pump can be used as the compressor. By circulating the refrigerant of the cooler 28 thus configured in the cooling coil 29 arranged at the bottom of the cold insulation container 14 ',
The cooling liquid is forcibly cooled. In the present embodiment, the control box 11 including the electromagnetic pump 15 'is attached to the upper surface of the lid 3'for convenience of construction. Therefore, the suction pipe 18 'from the cold insulation container 14' is vertical and is directly connected to the suction side of the electromagnetic pump 15 '. The discharge side of the electromagnetic pump 15 ′ reaches the discharge side connecting fitting 24 via the flow rate adjusting valve 16. On the upper surface of the control panel 12 arranged in the control box 11, the flow rate adjusting valve 16, the switch 22, the switch of the cooler, the indicator lamp, and the like are installed. Further, inside the control box 11, a control electric circuit 26 for performing a required operation is housed.

The cooling liquid in the cool container 14 ′ is cooled from the initial operation of the electromagnetic pump, that is, from the start of work by the ice block directly put inside or the ice block contained in the ice bag 27 made of a material having good heat conductivity. After that, the cooling coil 29 of the cooler 28 is used to further strengthen the degree of cooling so as to maintain the cooling effect of the cool suit for a long time.

In this case, the amount of ice blocks to be put into the container 14 'is much smaller than that in the first embodiment, so that the volume of the container 14' can be downsized. Therefore, the tank 2 ', the lid 3', and the like can be formed in a small size, and even if the cooler 28 is added integrally, the overall size does not become so large.

Incidentally, the cooling capacity of the cooler 28 in this embodiment is about 150 kCal / 60 Hz, and the power consumption of the compressor is 50 W.

Further, the automatic control of the temperature inside the cool suit as described above in the present embodiment, the cooling water temperature is detected by a heat sensitive sensor such as a thermistor, and the on / off control of the operation of the cooler is adopted, or the operation of the cooler is controlled. For this purpose, an inverter power supply device is used to change the frequency of the power supplied to the electric motor in response to the detected cooling water temperature, so-called inverter control is adopted, and the cooling capacity can be adjusted. it can.

The other structure is similar to that of the embodiment shown in FIG.

In both of the first and second embodiments, the electromagnetic pump is arranged in the control box, but a submersible electromagnetic pump used in the cooling liquid in the case can be used. Furthermore, although an example of using an electromagnetic pump in consideration of efficient absorption of the calorific value of the electromagnetic coil by the cooling liquid is disclosed, even if other types of electromagnetic pumps are used on the safe side in terms of temperature. Therefore, it is possible to use another type of electromagnetic pump.

Next, the experimental results regarding the cooling performance and other characteristics using the cool suit by the cooling unit of the cool suit according to the present invention will be described below.

This experiment was carried out in a constant temperature and humidity chamber that constantly maintains a humidity of 80% and an air temperature of 36 ° C., assuming hot summer. Since work in a high place in such an extremely hot atmosphere is usually performed for a maximum of two consecutive hours, a plurality of sets of human body experiments were carried out for each of the people in their 20s, 30s, and 40s.

The temperature after cooling is lower than 10 ° C until the inside of the initial cool suit cools, and then a cooling liquid of around 10 ° C is circulated at 5 to 10 per hour through an electromagnetic pump in the flexible cooling pipe of the cool suit. The human body was comfortable without any discomfort or discomfort. Further, in such a state, a cooling effect was obtained such that the temperature between the cool suit and the body was kept slightly lower than the body temperature. In this experiment, a plurality of temperature sensors are arranged inside the cool suit 31 so as to shield the thermal effect from the body, and in the tank 2 of the cold insulation container 14, in addition to the thermometer 9, the vicinity of the filter 21 is provided. A temperature sensor for measuring the cooling liquid temperature of 1 was provided, and the cool suit 31 and the cooling liquid temperature were measured.

FIG. 10 shows cooling time when the cooling time [min] is plotted on the horizontal axis and the temperature [° C.] is plotted on the vertical axis, and the cooling units of the cool suits in FIGS. It shows the characteristics. In the figure, a broken line T _A is an atmospheric temperature, a thin solid line T ₁ and a dashed line T ₂ are curves showing changes in the cooling liquid temperature in the cool container when one cool suit is used and when two cool suits are used. . The thick solid line T _B1 and the one-dot chain line T _B2 indicate the temperature change inside the cool suit.

The tank 2 has a capacity of 12 and contains 4
The ice lump of kg is directly charged, the electromagnetic pump is started after 10 minutes, and the elapsed time after the cooling unit operation of the cool suit is started is shown on the horizontal axis. The discharge flow rate of the electromagnetic pump was set to 5 and 10 and the discharge pressure was set to 3000 when using one cool suit and when using two cool suits.
The fluidity exceeds that of mmAq to ensure flowability superior to the flow resistance of the cooling liquid in the flexible cooling pipe in the cool suit.

When using two cool suits, the temperature of the coolant is
It begins to rise after 120 minutes (2 hours) have passed, but until the cool suit internal temperature has passed 180 minutes (3 hours),
It was confirmed that there is no problem in practical use because the temperature is kept below the body temperature and the ambient temperature.

In addition, in this experiment, the whole is for a long time,
For the part exceeding 2 hours, a human body-sized human pedestal having a built-in heater capable of holding at about 40 ° C. was used instead of the human body experiment. The surface temperature of the pedestal thus constructed is set to be slightly higher in consideration of the increase in body temperature during human work.

FIG. 11 shows a characteristic curve when the second embodiment shown in FIG. 9 of the cooling unit of the cool suit according to the present invention is applied to the cool suit. The broken line T _A is
Temperature inside constant temperature and humidity chamber, thin solid line T ₁ ′ and alternate long and short dash line T
_{2 'is} a curve showing the cold vessel changes in the coolant temperature when used and when two pieces using cool suit wearing. The thick solid line T _B1 ′ and the alternate long and short dash line T _B2 ′ show the temperature change inside the cool suit when one wear is used and when two wear is used.

The volume of the tank 2'of the unit was 7, the cooling liquid was 2, the amount of ice cubes to be charged directly or in an ice bag was 2 kg, and the operation of the electromagnetic pump and the cooling machine was started 10 minutes after the ice mass was charged. The discharge flow rate of the electromagnetic pump 15 'and other conditions are the same as in the example shown in FIG.

In the experiment shown in FIG. 11, since the cooling machine 28 is used as compared with the example shown in FIG. 10, a small amount of ice blocks necessary for the cooling action at the beginning of the operation is sufficient, so that the tank 2 '
Can be formed in a small capacity. Therefore, the cold storage container 14 'is also downsized, and the total size does not become so large even if the cooler 28 is added, as described above. Further, since it is equipped with a cooler, it is suitable for operation for maintaining the cooling action for a long time.

In addition, in FIG. 10 and FIG. 11, the inside temperatures of the cool suits T _B2 and T when two cool suits are used
_B2 'is cool suit inner temperature T _B1 and T _B1 when using the cool suit wearing' it is slightly lower appeared portions than this, although changing the operating conditions of the electromagnetic pump, with increased flow rate It is understood that this is due to the fact that the cooling effect of the electromagnetic coil by the cooling liquid is also increased.

The temperature of the cooling liquid in the vicinity of the filter 21 in the tanks 2 and 2'has a smaller temperature difference when two cool suits are used than when one cool suit is used. This is done through the flexible cooling pipe 37 of the cool suit from the return side connecting fittings 25, 25 'to the tank 2,
The amount released to 2'is about twice as much as when wearing two cool suits, so that the cooling liquid containing ice blocks with a low specific gravity is easily stirred and drops downward. In the example, T ₁ and T ₂ are about 90 minutes and T ₁ ′ due to the fact that the cooling coil 29 is arranged below, for example.
And T ₂ 'continuously showed almost no temperature difference over time. As described in detail above, the cooling unit for the cool suit of the present invention sufficiently achieves its intended purpose.

〔The invention's effect〕

As described above, when the cooling unit of the cool suit having the configuration according to the present invention is applied to the cool suit, the following effects can be obtained.

(a) It is possible to relieve the harsh working conditions in high-altitude work when the ambient temperature is high, such as in the hot summer, and to create a desirable environment for the worker from the viewpoint of comfort and health and hygiene. The cool suit used here is small, thin and lightweight, easy to put on and take off, and flexible inflow and outflow pipes can be appropriately lengthed in consideration of the work contents. There is nothing to do.

(b) Since it enables the use of ice blocks that are easily available, and the electromagnetic pump also allows the use of small, portable storage batteries, it is convenient for small size and portable, and there is no restriction on the place of use.

(c) Cooling liquid flows through the electromagnetic pump that circulates the cooling liquid and absorbs the heat generated by the electromagnetic coil, reducing its electrical resistance and increasing the magnetic force, increasing the pump output. Moreover, power consumption can be reduced. By the way, the calorific value of the electromagnetic coil is due to the power consumption of only a few watts and is extremely small, so that the influence of the temperature rise of the cooling liquid is minute.

(d) Electromagnetic pumps are for both direct and direct use, and their flow rate is easier to control than rotary pumps and positive displacement pumps. That is,
In the electromagnetic pump, the flow rate can be controlled very easily by making the output pulse generated by the control circuit variable in addition to directly adjusting the flow rate by the flow rate adjusting valve. In addition, the change in power consumption due to the change in the discharge amount is extremely small, and the change in the heat generation amount is small.

(e) Electromagnetic pumps are highly watertight and do not have the difficulties of shaft sealing of the motor part of rotary pumps. Further, compared with the case of using a single-phase induction motor, it is advantageous in all points such as limitation of power source, weight and price.

(f) As described above, the flow rate control of the electromagnetic pump can be finely adjusted, and therefore the temperature control can be finely adjusted according to the environment, type or degree of operation of the cool suit, or the wearer's preference. In this case, since the durability of the electromagnetic pump itself has been confirmed in various heating devices, water heaters, etc., sufficient durability can be ensured even in the cooling unit of the cool suit according to the present invention. It is cheaper than a pump.

Although the present invention discloses cooling only,
It goes without saying that it can be applied as it is as cold and warm clothing. Of course, in this case, since the liquid passing through the electromagnetic coil has a high temperature, a liquid having a certain capacity margin should be applied. Further, such cooling / heating effects can be applied in the fields of medical treatment, beauty treatment, various trainings, and the like.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining a perspective view of a cooling unit for a cool suit according to the present invention, which is partially broken, FIG. 2 is a perspective view for explaining an example of a cool suit, and FIG. 3 is a cooling for a cool suit according to the present invention. FIG. 4 is a longitudinal sectional view of an electromagnetic pump used in the unit, FIG. 4 to FIG. 8 are connection diagrams including the power source and control circuit of the electromagnetic pump shown in FIG. 3, and FIG. 9 is a cooling unit for a cool suit according to the present invention. FIG. 10 is a perspective view for explaining a perspective structure of another embodiment of the present invention, FIG. 10 is a cooling characteristic curve when the embodiment of FIG. 1 is combined with a cool suit, and FIG. 11 is an embodiment of FIG. It is a cooling characteristic curve when combining and a cool suit. Correspondence between the main reference symbols in the figure is as follows. 1,30: Cooling unit 11: Control box, 12: Control panel 14,14 ': Cooling container, 15,15': Electromagnetic pump 26,26A, 26D: Control circuit 28: Cooler, 29: Cooling coil 31: Cool Suit, 34: Inflow pipe 35: Outflow pipe, 37: Flexible cooling pipe 40, 40 ': Electromagnetic coil

Claims (5)

[Claims] 1. A cool suit comprising a thin clothing having a small-diameter flexible cooling pipe disposed therein, the cooling liquid is fed through the inflow pipe to circulate in the cool suit, and then returned from the outflow pipe. In a cooling unit of a cooling liquid circulation type cool suit, especially for a work gondola or a vehicle cockpit, which has a cooling container for collecting this, the cooling liquid in the cold container is sucked and flows into the cool suit. An electromagnetic pump for pressure-feeding through a pipe, a flow rate adjusting valve connected to the discharge side of the electromagnetic pump for opening and closing the discharge pipe and for roughly adjusting the flow rate, and finely adjusting the flow rate of the cooling liquid. A cooling unit for a cool suit, comprising: a pulse current control device for energizing an electromagnetic coil of the electromagnetic pump for regulating a temperature in the cool suit. 2. The cooling unit for a cool suit according to claim 1, wherein the pulse current control device comprises:
A cooling unit of a cool suit, which is a half-wave phase angle control circuit of an AC power supply for energizing the electromagnetic coil. 3. The cool suit cooling unit according to claim 1, wherein the pulse current control device is:
A cool suit, which is a power supply circuit capable of controlling either one or both of the cycle of the pulse or the energization time of each cycle in a pulse oscillation circuit of a direct current that rectifies an alternating current power supply to energize the electromagnetic coil. Cooling unit. 4. The cooling unit for a cool suit according to claim 1, wherein the pulse current control device comprises:
In order to energize the electromagnetic coil, a power supply circuit capable of controlling either or both of the cycle of the pulse or the energization time of each cycle in the pulse oscillation circuit of the DC power supply current from the storage battery, in a cool suit Cooling unit. 5. The cooling unit for a cool suit according to claim 1, wherein the pulse current control device applies an alternating current to a current for energizing the electromagnetic coil. Or a cooling unit of a cool suit, which is a power circuit that can be switched to direct current.