JPH0115382Y2 - - Google Patents

Description

[Detailed explanation of the idea]

INDUSTRIAL APPLICATION FIELD The present invention relates to a low-temperature treatment device used for local low-temperature treatment that aims to relieve pain and spasticity in an affected area and to improve secondary blood circulation by applying cold air to the affected area. Prior art The prior art technology shown in Utility Model Application No. 59-130718 consists of a refrigerant condensing unit and a refrigerant generating unit, and the cold air generating unit is provided with two cooling chambers.
Outside air is taken into the first cooling chamber and cold air is taken out from the second cooling chamber. During continuous use, it has a mechanism that switches between an air inlet pipe and an air outlet pipe so that outside air is taken into the second cooling chamber and cold air is taken out from the first cooling chamber as necessary. Problems that the invention attempts to solve In the technology shown in Utility Model Application Publication No. 59-130718,
In order to obtain the temperature and amount of low-temperature air required for treatment, outside air is cooled all at once to an extremely low temperature below zero within a single insulated case. Therefore, the air cooler inside the heat insulating case is prone to frost, making it difficult to extract low-temperature air by continuous operation for a long period of time. That is, when frost forms on the air cooler of the first cooling chamber to which the outlet pipe is connected, the air temperature rises rapidly. At this time, even if the outlet pipe is switched to the second cooler, it will take some time for the function of the first cooling chamber to recover in order to obtain low-temperature air at the desired temperature from the second cooler, so the device will not function temporarily. This will result in a decline. Furthermore, when the frost in the first cooling chamber melts and moves toward the second cooling chamber along with the ventilation, frost is more likely to form on the air cooler in the second cooling chamber. It is difficult to obtain it continuously over time. Means for Solving the Problems The present invention attempts to overcome the drawbacks of conventional devices, and its purpose is to provide a multi-stage cooling type cryotherapy device that can be operated efficiently and continuously. That is, the present invention includes a precooler section 2 having a precooler 10, a cooler 5a on one side, and a cooler 5b on the other side.
and a main cooling device section 1 having a switching mechanism 25 for controlling the cooling operation of one cooler 5a and the other cooler 5b are connected by an air path control section 3, and the air path control section 3 is connected to the outside air. This is a multi-stage cooling type low-temperature treatment device configured so that air from an air blower 13 that blows air passes through a pre-cooler 10 and is controlled by selecting either one of the coolers 5a or the other cooler 5b. The air path control unit 3 also includes a cold air selector 17 that selectively applies the cold air obtained from the precooler 10 to either one of the coolers 5a or the other cooler 5b; It has a discharge selector 20 that selects and takes out either of the cold air from the cooler 5b. In addition, the air path control unit 3 is provided with an outside air selector 21 in parallel with the discharge selector 20, so that the air from the blower 13 is switched between the precooler 10 and the outside air in the air path from the blower 13 to the precooler 10. An air path selector 23 is provided to select one of the selectors 21, and further selects either cold air from one cooler 5a or cold air from the other cooler 5b, and obtains the cold air from the common port 22c. A suction selector 22 provided to the stationary cooler 10 is provided in parallel with a cold air selector 17. The switching mechanism 25 is a refrigerant selector 8 that selects either the one cooler 5a or the other cooler 5b for cooling operation. The switching mechanism 25 includes a power switch 28 for the compressor 26 that supplies refrigerant to the cooler 5a on the one hand, and a power switch 29 for the compressor 27 that supplies refrigerant to the cooler 5b on the other hand. Further, it has an interlocking mechanism 27 that opens the other power switch after a predetermined period of time from when one of the power switches is closed. Embodiment An embodiment of the present invention will be described based on the accompanying drawings. The first embodiment of the present invention has a main cooling device section 1 and a precooling device section 2 having a cooling effect, and the main cooling device section 1 and the precooling device section 2 are connected to each other by using pipes, blowers, etc.
and an air path control section 3 connected by various selectors to control the air path. The main cooling unit 1 includes two coolers having the same structure, each having a heat exchanger 4 inside, one cooler 5a and the other cooler 5b, and a refrigerant that is circulated and supplied to the one cooler 5a and the other cooler 5b. A compressor 6 that compresses and condenses, a radiator 7 that cools the refrigerant, and a cooler 5a on one side and a cooler 5b on the other side in the refrigerant circulation path.
The refrigerant selector 8 is a specific example of a switching mechanism 25 that selects one of the refrigerant and supplies and passes the refrigerant. The precooler unit 2 includes a precooler 10 having a heat exchanger 9 therein, a compressor 11 that compresses and condenses the refrigerant that is circulated and supplied to the precooler 10, and a radiator 12 that cools the refrigerant. It consists of. The air path control unit 3 has a blower 13 that blows outside air into an air path made of a pipe material, and has a discharge port 1 of the blower 13.
The air path from 4 is connected to the ventilation inlet 15 of the precooler 10. The ventilation outlet 16 of the precooler 10 is a common port 17c of a cold air selector 17 that selects one of two air paths, one air path leading to the cooler 5a and the other air path leading to the cooler 5b. connected to. Two selection ports 17a and 17b of the cold air selector 17 are connected to ventilation ports 18a and 18b at one end of one cooler 5a and the other cooler 5b, respectively. Ventilation holes 19 at the other end of each of the one cooler 5a and the other cooler 5b
a, 19b are one cooler 5a or the other cooler 5b
It is connected to both selection ports 20a and 20b of a discharge selector 20 that opens an air path by appropriately selecting one of the two. The precooler 10, one cooler 5a, and the other cooler 5b are provided with a drain valve 24 for discharging water and oil accumulated at the bottom. From the blower 13 to the precooler 10 of the previously described embodiment
A second embodiment shown in FIG. 2, in which a cooler to which no refrigerant is supplied, that is, a rest cooler, is interposed in the middle of the air path leading to the air passage will be described below. In the air path control unit 3, both selection ports 21a of the outside air selector 21 are arranged in parallel with both the selection ports 20a and 20b of the discharge selector 20, and selectively allocate air obtained from the common port 21c to both the selection ports 21a and 21b. , 21b. Also, both selection ports 17a, 1 of the cold air selector 17
Both selection ports 22a and 22b of the suction selector 22 which selects the air obtained at both selection ports 22a and 22b and discharges it from the common port 22c are connected in parallel to 7b.
The common port 22c of the suction selector 22 is connected to the precooler 1.
It is connected to the ventilation inlet 15 of 0. The discharge port 14 of the blower 13 is connected to a common port 23c of an air path selector 23 that selects and supplies the air sent from the blower 13 to either the precooler 10 or the outside air selector 21. Both selection ports 23a and 23b of the container 23 are the common port 2 of the outside air selector 21, respectively.
1c and the ventilation inlet 15 of the precooler 10. Next, the main cooling device section 1 of the first embodiment described at the beginning
A third embodiment shown in FIG. 3 will be described in which two coolers are each provided with a dedicated refrigerant circuit. On the other hand, the compressor 6 supplies refrigerant to the cooler 5a.
One power switch 26a and the other power switch 26b supply power to the one compressor 6a and the other compressor 6b.The temperature sensor 28 detects the temperature of the cold air. The operation is controlled by an interlocking mechanism 27 consisting of a comparator, a timer, etc., which operates upon detecting. Function The heat of the air in one cooler 5a and the other cooler 5b of the main cooling device section 1 is removed by the refrigerant compressed by the compressor 6 and passed through the heat exchanger 4, and this removed heat is transferred from the radiator 7. Dissipates into the outside air. Similarly, the heat of the air in the precooler 10 of the precooler section 2 is removed by the refrigerant compressed by the compressor 11 and passed through the heat exchanger 9, and this removed heat is transferred to the outside air by the radiator 12. Dissipate. The blower 13 of the air path control unit 3 blows outside air to the precooler 10, and the cold air discharged from the precooler 10 is sent to one cooler 5a or the other cooler 5b according to the selection of the cold air selector 17. A discharge selector 20 selectively extracts cold air discharged from either one cooler 5a or the other cooler 5b,
This cold air is discharged from the common port 20c of the discharge selector 20, and the discharged cold air is used for treatment. When the device of the present invention is used continuously for a long time, the cooler on the side to which the refrigerant is supplied, that is, the operating cooler, for example, if it is called the one cooler 5a, the one cooler 5
Frost adheres to the heat exchanger 4a of a, reducing the cooling capacity. When the cooling capacity decreases, the temperature of the cold air increases.
When the operator detects the cold air temperature with the temperature sensor 28 and sees the display 29 and learns that the temperature of the cold air has increased, he immediately manually operates the cold air selector 17, refrigerant selector 8, and discharge selector 20 to select the refrigerant. The air passage is switched to the side of the other cooler 5b which is not supplied with air and is inactive, and the air path is switched to the side of the other cooler 5b. After the air path is changed to the other cooler 5b by this switching operation, if the apparatus is used continuously again, frost will adhere to the heat exchanger 4b of the other cooler 5b as described above. As soon as frost adheres, the cold air selector 17
The discharge selector 20 and the refrigerant selector 8 are connected to the cooler 5.
Switching to side a, one cooler 5a is operated for cooling, and at the same time, the ventilation passage of one cooler 5a is opened and cold air is continued to be taken out from the common port 20c of the discharge selector 20. The precooler 10 dehumidifies the outside air and cools it to approximately 0°C, and the outside air at approximately 0°C is cooled to approximately -40°C in one cooler 5a or the other cooler 5b. The drain valves 24 of the precooler 10, one cooler 5a, and the other cooler 5b drain condensed water, water formed by melting oil and frost, and the like. Next, the case of the second embodiment will be described. Set the selection of the air path selector 23 to the outside air selector 21 side, select the side of the idle cooler, for example, the other cooler 5b, with the outside air selector 21 and the suction selector 22, and turn the blower 1
The outside air blown in step 3 is passed through the other cooler 5b, and then air is introduced into the precooler 10. Outside air is passed through the other cooler 5b to quickly and completely melt the frost attached to the heat exchanger 4b of the other cooler 5b. If frost forms on the operating cooler during continuous use of this device, the refrigerant selector 8 is activated, the refrigerant supply is switched from the operating cooler to the idle cooler, and the cooling operation of the active cooler is stopped and the cooler is shut down. Turn on the cooler. As the cooling operation of one cooler 5a and the other cooler 5b is switched, the cold air selector 17 and the discharge selector 20 are operated in synchronization, and the cold air from the precooler 10 is always selected as the operating cooler. Ventilate and re-cool. The operator detects the occurrence of frost in the cooler by looking at the display, and at the same time manually operates the refrigerant selector 8, cold air selector 17, discharge selector 20, outside air selector 21, and suction selector 22. On the other hand, when the cold air selector 17, the discharge selector 20, the outside air selector 21, and the intake selector 22 operate, the outside air sent from the blower 13 always passes through the idle cooler and is blown to the precooler 10. , and defrost the inside of the idle cooler using outside air ventilation. The selection modes of each selector in the first and second embodiments described above are shown in Tables 1 and 2 below. Example 1

【table】 Example 2

【table】

[Table] Next, the operation of the third embodiment will be described. In the first embodiment, switching between the cooling operations of the one cooler 5a and the other cooler 5b was carried out using the refrigerant selector 8, which is a specific example of the switching mechanism 25, but in the third embodiment, one compressor 6a and the other compressor One power switch 26a and the other power switch 26 that apply power to the machine 6b
Perform with b. Similarly to the first embodiment, when frost occurs in one cooler 5a during cooling operation, one power switch 26a is opened, and the other power switch 26b is immediately closed to activate the other compressor 6b, which is inactive. Cool the cooler 5b. At the same time as the switching operation of both power switches, the cold air selector 17 and the discharge selector 2
0 is activated to cause the cold air obtained from the precooler 10 to pass through the other cooler 5b. While the other cooler 5b is operating, the cooling operation of the one cooler 5a is stopped, the frost in the cooler 5a is melted, and the water that has accumulated after melting is drained as appropriate. Additionally, when the device is being used continuously, if the temperature of the cold air rises due to the formation of frost inside the operating cooler and the resulting reduction in cooling efficiency, the interlocking mechanism 27 will be activated by a signal from the temperature sensor 28, and the idle cooler will be activated. Turn on the power switch of the compressor on the side, and after a while, turn off the power switch of the compressor on the cooler side. As described above, the interlocking mechanism 27 causes the idle cooler to operate for cooling for a while before stopping the cooling of the active cooler. Note that if the cold air selector 17 and the discharge selector 20 are configured with solenoid valves (not shown), the solenoid valves can be connected to the interlocking mechanism 2.
7 to automatically switch the air path. Effects of the invention: By providing two cooling units, the main cooling unit and the pre-cooling unit, the outside air is divided into two stages and cooled in stages. It performs dehumidification and cooling, reduces the occurrence of frost and dew condensation in the main cooling device, and cools from approximately 0°C to approximately -40°C. In this way, the temperature range for cooling is shared between each cooling device section, which is uneconomical due to the conventional method of using a large amount of refrigerant whose boiling point is lower than the desired temperature of the cold air, and the need to remove a large amount of air at once without dehumidification. This eliminates the harmful effects of frost caused by cooling. That is, according to the staged cooling of this device, the quality of the refrigerant can be appropriately selected from two types, which is economical, and also enables effective cooling by reducing the occurrence of frost and dew condensation. Furthermore, the air path control section is provided with a cold air selector and a discharge selector for selecting either the air path of one cooler or the air path of the other cooler, and a switching mechanism that operates one of the two coolers. Because of this, when frost forms on the heat exchanger of one cooler, it is easy to activate the other cooler and switch the air path to the other cooler, allowing continuous cooling for a long time without reducing cooling efficiency. It became possible to perform treatment using this device. In addition, an air path selector, an outside air selector, and an intake selector are installed to select and pass the blown outside air through the idle cooler of the two coolers, so frost on the heat exchanger can be removed more quickly by the outside air temperature. When completely melted, the idle cooler can quickly return to a state with a normal cooling function and be placed on standby. Therefore, when frost formed on the active cooler, the cooling operation was immediately resumed as soon as the switch was made to the idle cooler. Therefore, in treatment, when the two coolers are mutually switched, cold air can be stably extracted without reducing cooling efficiency, and continuous use can be performed with peace of mind. In addition, the air supplied to the pre-cooler is also slightly cooled at the same time as the defrost in the idle cooler, which further improves the cooling efficiency. In addition, with conventional devices that switch between the inlet air path and the outlet air path to the cooling room, temperature fluctuations occur when switching, but with the two-stage cooling type of the device of the present invention, approximately two-thirds of the temperature range to be cooled occurs. Since two coolers are alternately switched for each temperature range, there is little temperature variation when the cooling temperatures are totaled. Therefore, since this device can obtain low-temperature air at a stable temperature, it has many therapeutic effects and can be safely performed.

[Brief explanation of the drawing]

The attached drawings show embodiments of the present invention, with Fig. 1 being a wiring diagram showing the basic structure, Fig. 2 being a wiring diagram showing the second embodiment, and Fig. 3 showing the third embodiment. A wiring diagram is shown. 1... Main cooling device section, 2... Pre-cooling device section,
3... Air path control section, 5a... One side cooler, 5b...
...other cooler, 10... precooler, 13... blower, 17... cold air selector, 20... discharge selector, 25... selection mechanism.

Claims (1)

[Claims for Utility Model Registration] (1) Precooler section 2 having precooler 10
and a main cooling device section 1 having one cooler 5a and the other cooler 5b and having a switching mechanism 25 for controlling the cooling operation of the one cooler 5a and the other cooler 5b are connected by the air path control section 3. The air path control unit 3 is configured to select either the cooler 5a or the cooler 5b to control the ventilation from the blower 13 that blows outside air through the precooler 10. A multi-stage cooling low temperature treatment device. (2) The air path control unit 3 includes a cold air selector 17 that selectively applies the cold air obtained from the precooler 10 to either one of the coolers 5a or the other cooler 5b, and a cold air selector 17 that selectively applies the cold air obtained from the precooler 10 to either the cooler 5a or the other cooler 5b. A discharge selector 2 that selects and takes out one of the cold air from the other cooler 5b.
0. The multi-stage cooling type low temperature treatment device according to claim 1, which is characterized by having the following features: (3) The air path control unit 3 is provided with an outside air selector 21 in parallel with the discharge selector 20, so that the air from the blower 13 is routed from the air blower 13 to the precooler 10 in the air path from the blower 13 to the precooler 10. An air path selector 23 is provided to select one of the outside air selectors 21, and further selects either cold air from one cooler 5a or cold air from the other cooler 5b, and obtains the cold air at the common port 22c. Suction selector 2 provided to precooler 10
2 in parallel with the cold air selector 17.
The multi-stage cooling type cryotherapy device described in 2. (4) Multi-stage cooling according to claim 1, wherein the switching mechanism 25 is a refrigerant selector 8 that selects either the one cooler 5a or the other cooler 5b for cooling operation. Cryotherapy device. (5) The switching mechanism 25 is comprised of a power switch 28 for the compressor 26 that supplies refrigerant to the cooler 5a on the one hand, and a power switch 29 for the compressor 27 that supplies refrigerant to the cooler 5b on the other hand. A multi-stage cooling type low temperature treatment device according to claim 1 of the patent registration claim. (6) The multi-stage cooling according to claim 1 of the utility model registration, characterized in that it has an interlocking mechanism 27 that opens the other power switch after a predetermined time from the time when one of the open power switches is closed. Cryotherapy device.