CN110869755B - Refrigerant detection sensor and refrigeration device using same - Google Patents
Refrigerant detection sensor and refrigeration device using same Download PDFInfo
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- CN110869755B CN110869755B CN201880045662.7A CN201880045662A CN110869755B CN 110869755 B CN110869755 B CN 110869755B CN 201880045662 A CN201880045662 A CN 201880045662A CN 110869755 B CN110869755 B CN 110869755B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
Abstract
The refrigerant detection sensor (30) is provided with at least 1 sensor element (42), a filter (45), a sensor cover (41), and a sensor case (31). The sensor element (42) is configured to detect the refrigerant gas. The filter (45) is disposed in the vicinity of the sensor element (42). The sensor cover (41) guides the refrigerant gas that has passed through the filter (45) to the sensor element (42). The sensor case (31) has a sensor case internal space facing at least one of the filter (45) and the sensor cover (41) or including at least one of the above. A1 st opening (32a) communicating with a 1 st detection target space (13a) and a 2 nd opening (32b) communicating with a 2 nd detection target space (13b) are formed in the sensor case (31).
Description
Technical Field
The present invention relates to a refrigerant detection sensor and a refrigeration apparatus using the same.
Background
In order to stop the operation of the refrigeration apparatus when the refrigerant leaks from the refrigeration apparatus, a refrigerant detection sensor may be mounted in the refrigeration apparatus. The gas sensor disclosed in patent document 1 (japanese patent application laid-open No. 2002-257767) can be used as such a refrigerant detection sensor.
Disclosure of Invention
Technical problem to be solved by the invention
The inside of the casing of the refrigeration apparatus may be partitioned into 2 or more spaces by a partition member or the like. However, if the refrigerant detection sensor is provided in each space, the cost of the refrigeration apparatus increases. Conversely, if a refrigerant detection sensor is provided only in a part of the space, the refrigerant leakage may not be detected.
The invention aims to detect the leakage of refrigerant by using a small number of refrigerant detection sensors and reduce the cost of a refrigeration device.
Means for solving the problems
The refrigerant detection sensor according to claim 1 of the present invention detects the presence of flammable refrigerant gas in the 1 st detection target space and the 2 nd detection target space. The refrigerant detection sensor includes at least 1 sensor element, a filter, a sensor cover, and a sensor case. At least 1 sensor element is configured to detect refrigerant gas. The filter is disposed in the vicinity of at least 1 sensor element. The sensor cover guides the refrigerant gas having passed through the filter to at least 1 sensor element. The sensor cartridge has a sensor cartridge interior space facing or containing at least one of the filter and the sensor cover. The sensor cartridge is formed with a 1 st opening communicating with the 1 st detection target space and a 2 nd opening communicating with the 2 nd detection target space.
According to this configuration, the refrigerant gas present in either of the 1 st detection target space and the 2 nd detection target space can reach the sensor element disposed inside the common sensor cartridge. Therefore, at least the number of sensor cartridges to be prepared is not as large as the number of detection target spaces, whereby the cost of the refrigerant detection sensor can be reduced.
The refrigerant detection sensor according to claim 2 of the present invention is the refrigerant detection sensor according to claim 1, wherein the sensor case has a sensor case partition portion that contacts the filter. The sensor cartridge partition section divides the internal space of the sensor cartridge into a 1 st sensor cartridge internal space communicating with the 1 st opening section and a 2 nd sensor cartridge internal space communicating with the 2 nd opening section.
According to this configuration, the sensor cartridge internal space is partitioned into the 1 st sensor cartridge internal space and the 2 nd sensor cartridge internal space by the sensor cartridge partition portion. Therefore, the refrigerant gas can be suppressed from moving from one of the 1 st opening and the 2 nd opening to the other without passing through the sensor element, whereby the detection accuracy of the refrigerant gas can be improved.
The refrigerant detection sensor according to claim 3 of the present invention is the refrigerant detection sensor according to claim 1, further comprising a circuit board having a 1 st surface and a 2 nd surface opposite to the 1 st surface. The at least 1 sensor element includes a 1 st sensor element mounted on the 1 st surface and a 2 nd sensor element mounted on the 2 nd surface. The circuit board divides the internal space of the sensor case into a 1 st internal space of the sensor case communicating with the 1 st opening and a 2 nd internal space of the sensor case communicating with the 2 nd opening. The 1 st sensor element is disposed in the 1 st sensor cartridge internal space, and the 2 nd sensor element is disposed in the 2 nd sensor cartridge internal space.
According to this configuration, the space inside the sensor case is partitioned into the 1 st sensor case internal space and the 2 nd sensor case internal space by the circuit board. Therefore, the structure of the sensor cartridge can be simplified, and thus the cost of the refrigerant detection sensor can be reduced.
The refrigerant detection sensor according to claim 4 of the present invention is the refrigerant detection sensor according to claim 1 or 2, wherein the sensor cover has a sensor cover partition portion that is in contact with the filter. The sensor cover partition divides a sensor cover internal space defined by the sensor cover into a 1 st sensor cover internal space communicating with the 1 st opening and a 2 nd sensor cover internal space communicating with the 2 nd opening.
According to this configuration, the sensor-cover internal space is partitioned into the 1 st sensor-cover internal space and the 2 nd sensor-cover internal space by the sensor-cover partition portion. Therefore, the refrigerant gas can be suppressed from moving from one of the 1 st opening and the 2 nd opening to the other without passing through the sensor element, whereby the detection accuracy of the refrigerant gas can be further improved.
The refrigerant detection sensor according to claim 5 of the present invention is the refrigerant detection sensor according to claim 4, wherein the at least 1 sensor element includes 1 sensor element which penetrates the sensor-cover partition and is located in both the 1 st sensor-cover internal space and the 2 nd sensor-cover internal space.
With this configuration, the same sensor element can detect the refrigerant gas present in both of the 1 st sensor-housing internal space and the 2 nd sensor-housing internal space. Therefore, the number of required sensor elements can be reduced, and the cost of the refrigerant detection sensor can be further reduced.
The refrigerant detection sensor according to claim 6 of the present invention is the refrigerant detection sensor according to claim 4, wherein the at least 1 sensor element includes a 1 st sensor element disposed in the 1 st sensor-cover internal space and a 2 nd sensor element disposed in the 2 nd sensor-cover internal space.
According to this configuration, the sensor elements are disposed in the 1 st sensor cover internal space and the 2 nd sensor cover internal space, respectively. Therefore, the detection performance of 1 sensor element can be used for all of the 1 st sensor cover internal space and the 2 nd sensor cover internal space, and the detection accuracy of the refrigerant gas can be improved.
The refrigerant detection sensor according to claim 7 of the present invention is the refrigerant detection sensor according to any one of claims 1 to 6, wherein the filter includes a 1 st filter and a 2 nd filter that is coarser than the 1 st filter. The 1 st filter is disposed closer to the sensor element than the 2 nd filter.
According to this configuration, the gas outside the refrigerant detection sensor reaches the 2 nd filter before passing through the 1 st filter. Therefore, the 2 nd filter can inhibit the movement of solid particles and the like contained in the gas, thereby preventing the 1 st filter from being damaged.
The refrigerant detection sensor according to claim 8 of the present invention is the refrigerant detection sensor according to claim 7, wherein the filter has a filter partition portion that is in contact with both the 1 st filter and the 2 nd filter. The filter partition section divides a filter internal space defined by the 1 st filter and the 2 nd filter into a 1 st filter internal space communicating with the 1 st opening and a 2 nd filter internal space communicating with the 2 nd opening.
According to this configuration, the filter internal space is partitioned into the 1 st filter internal space and the 2 nd filter internal space by the filter partition portion. Therefore, the refrigerant gas can be suppressed from moving from one of the 1 st opening and the 2 nd opening to the other without passing through the sensor element, whereby the detection accuracy of the refrigerant gas can be further improved.
The refrigeration system according to claim 9 of the present invention uses the above-mentioned flammable refrigerant gas. The refrigeration device includes a refrigerant detection sensor, a casing, and a casing partition. The refrigerant detection sensor is any one of the viewpoint 1 to the viewpoint 8. The housing has a housing interior space. The case partition part partitions the case inner space into a 1 st space and a 2 nd space. The 1 st opening of the refrigerant detection sensor communicates with the 1 st space, which is the 1 st detection target space. The 2 nd opening of the refrigerant detection sensor communicates with the 2 nd space as the 2 nd detection target space.
According to this configuration, the refrigerant gas present in either of the 1 st space and the 2 nd space can reach the sensor element disposed inside the common sensor cartridge. Therefore, at least the number of sensor cartridges to be prepared is not as large as the number of detection target spaces, whereby the cost of the refrigeration apparatus can be reduced.
ADVANTAGEOUS EFFECTS OF INVENTION
The refrigerant detection sensor according to aspects 1, 3, and 5 of the present invention is low in cost.
The refrigerant detection sensor according to any one of aspects 2, 4, 6 and 8 of the present invention improves the accuracy of detection of the refrigerant gas.
The refrigerant detection sensor according to claim 7 of the present invention is less likely to be damaged.
The refrigeration apparatus according to claim 9 of the present invention is low in cost.
Drawings
Fig. 1 is a schematic diagram showing a configuration of a refrigeration apparatus 10 according to embodiment 1 of the present invention.
Fig. 2 is a sectional view showing the configuration of refrigerant detection sensor 30A mounted in refrigeration apparatus 10.
Fig. 3A is a schematic diagram showing the configuration of the sensor unit 40A.
Fig. 3B is a schematic diagram showing the configuration of the sensor unit 40B.
Fig. 3C is a schematic diagram showing the configuration of the sensor unit 40C.
Fig. 4A is a schematic diagram showing the configuration of the filter 45A.
Fig. 4B is a schematic diagram showing the configuration of the filter 45B.
Fig. 4C is a schematic diagram showing the configuration of the filter 45C.
Fig. 4D is a schematic diagram showing the configuration of the filter 45D.
Fig. 5A is a cross-sectional view showing an example of the configuration of the sensor unit 40A.
Fig. 5B is a cross-sectional view showing an example of the configuration of the sensor unit 40B.
Fig. 5C is a cross-sectional view showing an example of the structure of the sensor unit 40C.
Fig. 5D is a cross-sectional view showing an example of the configuration of the sensor unit 40A.
Fig. 5E is a cross-sectional view showing an example of the configuration of the sensor unit 40B.
Fig. 5F is a cross-sectional view showing an example of the structure of the sensor unit 40C.
Fig. 5G is a cross-sectional view showing an example of the structure of the sensor unit 40A.
Fig. 5H is a cross-sectional view showing an example of the structure of the sensor unit 40B.
Fig. 5I is a cross-sectional view showing an example of the configuration of the sensor unit 40C.
Fig. 5J is a cross-sectional view showing an example of the structure of the sensor unit 40A.
Fig. 5K is a cross-sectional view showing an example of the structure of the sensor unit 40B.
Fig. 5L is a cross-sectional view showing an example of the structure of the sensor unit 40C.
Fig. 6 is a schematic diagram showing the configuration of a refrigeration apparatus 10' according to modification 1A of embodiment 1 of the present invention.
Fig. 7 is a schematic diagram of the configuration of a refrigeration apparatus 10 ″ according to modification 1B of embodiment 1 of the present invention.
Fig. 8 is a sectional view showing the configuration of refrigerant detection sensor 30B mounted in refrigeration apparatus 10 according to embodiment 2 of the present invention.
Fig. 9 is a sectional view showing the configuration of a refrigerant detection sensor 30C mounted in the refrigeration apparatus 10 according to embodiment 3 of the present invention.
Fig. 10 is a sectional view showing the configuration of a refrigerant detection sensor 30D mounted on the refrigeration apparatus 10 according to embodiment 4 of the present invention.
Fig. 11 is a sectional view showing the configuration of a refrigerant detection sensor 30E mounted in the refrigeration apparatus 10 according to embodiment 5 of the present invention.
Detailed Description
< embodiment 1 >
(1) Is formed integrally
Fig. 1 shows a refrigeration apparatus 10 according to embodiment 1 of the present invention. The refrigeration apparatus 10 is configured as an indoor unit of an air conditioner. The refrigeration apparatus 10 includes a casing 11, a casing partition 12, and various components disposed in the casing 11. The casing 11 is provided with an air inlet 17 and an air outlet 18. The case partition portion 12 partitions the case internal space into a 1 st space 13a and a 2 nd space 13 b. The case partition 12 may be integrally molded with the case 11 or may be formed separately. The 1 st space 13a is a heat exchange chamber and houses a heat exchanger 14 and a flow divider 15. The 2 nd space 13b is a machine room and houses the fan 16. The 2 nd space 13b further accommodates a pipe connection portion 19 as a portion to which different refrigerant pipes are connected.
The refrigerant detection sensor 30 is included in various components. The refrigerant detection sensor 30 is disposed so as to span both the 1 st space 13a and the 2 nd space 13 b. Refrigerant detection sensor 30 has 1 st opening 32a and 2 nd opening 32 b. The 1 st opening 32a is provided on the 1 st space 13a side and communicates with the 1 st space 13 a. The 2 nd opening 32b is provided on the 2 nd space 13b side and communicates with the 2 nd space 13 b.
(2) Detailed constitution
Fig. 2 shows an example of the detailed configuration of the refrigerant detection sensor 30 as a refrigerant detection sensor 30A. The refrigerant detection sensor 30A includes a sensor case 31, a circuit board 37, and a sensor unit 40.
(2-1) sensor Cartridge 31
The sensor case 31 is a case made of resin or the like, and houses the sensor unit 40 and the circuit board 37. The sensor case 31 has the 1 st opening 32a and the 2 nd opening 32b described above. The 1 st opening 32a and the 2 nd opening 32b are used to receive the refrigerant gas from the 1 st space 13a and the 2 nd space 12b, respectively.
(2-2) Circuit Board 37
The circuit board 37 is mounted with a circuit for performing signal processing using the sensor unit 40. The circuit board 37 is placed on the circuit board support portion 33 of the sensor case 31, and is fixed to the circuit board support portion 33 with screws 38.
(2-3) sensor Unit 40
Fig. 3A shows an example of the structure of the sensor unit 40 as a sensor unit 40A. The sensor unit 40A has a sensor cover 41, a sensor element 42, and a filter 45. The sensor cover 41 has an opening, and the filter 45 is disposed in the opening. In this figure, the filter 45 is schematically depicted as a hatched rectangle. The sensor cover 41 houses the sensor element 42. The resistance value or other physical property of the sensor element 42 varies depending on the surrounding refrigerant gas concentration. The filter 45 removes foreign matter, moisture, and the like contained in the atmosphere, and allows the refrigerant gas to pass through toward the sensor element 42. The physical properties of the sensor element 42 are converted into electrical signals by an electric circuit mounted on the circuit board 37.
Fig. 4A shows an example of a specific structure of the filter 45 as a filter 45A. The filter 45A is composed of a layer of filter material 46. The filter material 46 is, for example, a porous ceramic material. The filter material 46 has fine pores.
The structure of the sensor unit 40 is specifically shown in fig. 5A. Fig. 5A shows a structure in which a filter 45A of fig. 4A is mounted on the sensor unit 40A of fig. 3A instead of the hatched rectangle.
(3) Operation of the refrigeration device 10
In the operation of the refrigeration apparatus 10 shown in fig. 1, the fan 16 disposed in the 2 nd space 13b sucks air from the suction port 17 and sends the air to the 1 st space 13 a. The air then exchanges heat with the refrigerant as it traverses the heat exchanger 14. The air conditioned by the heat exchanger 14 is blown out from the air outlet 18. Due to this action, in the air-conditioning action, the pressure in the 1 st space 13a is generally higher than that in the 2 nd space 13 b. When the air-conditioning operation is stopped, a pressure difference is not substantially generated between the 1 st space 13a and the 2 nd space 13 b.
(4) Feature(s)
(4-1)
The sensor case 31 has a 1 st opening 32a communicating with the 1 st space 13a and a 2 nd opening 32b communicating with the 2 nd space 13 b. Therefore, the refrigerant gas present in both the 1 st space 13a and the 2 nd space 13b can reach the sensor element 42 disposed inside the common sensor case 31. Therefore, the number of the sensor cartridges 31 to be prepared is not at least as large as the number of the detection target spaces, and thus the cost of the refrigerant detection sensor 30 can be reduced.
(4-2)
The refrigeration apparatus 10 has the refrigerant detection sensor 30 described above. Therefore, the cost of the refrigeration apparatus 10 can be reduced.
(5) Modification example
Modifications of the present embodiment will be described below. It should be noted that 2 or more modifications can be combined as appropriate.
(5-1) modification 1A
In the above-described embodiment shown in fig. 1, the refrigerant detection sensor 30 is disposed so as to straddle both the 1 st space 13a and the 2 nd space 13b partitioned by the casing partition portion 12. Instead, as shown in fig. 6, the refrigerant detection sensor 30 may be disposed in the 2 nd space 13b so that the 1 st opening 32a communicates with the 1 st space 13 a. Alternatively, the refrigerant detection sensor 30 may be disposed in the 1 st space 13a so that the 2 nd opening 32b communicates with the 2 nd space 13 b.
With this configuration, when there is a restriction on the arrangement of the various components of the refrigeration apparatus 10, it is easy to flexibly design the refrigeration apparatus in response to the restriction.
(5-2) modification 1B
In the above embodiment shown in fig. 1, the heat exchanger 14 and the flow divider 15 are housed in the 1 st space, and the fan 16 and the pipe connection portion 19 are housed in the 2 nd space. Instead of this, the 1 st space 13a and the 2 nd space 13b may house other combinations of the constituent members, respectively. For example, as shown in fig. 7, the heat exchanger 14, the flow divider 15, and the fan 16 may be housed in the 1 st space 13a, and the pipe connection portion 19 may be housed in the 2 nd space 13 b. In the air-conditioning operation, a pressure difference may be generated between the 1 st space 13a and the 2 nd space 13 b. When the air-conditioning operation is stopped, a pressure difference is not substantially generated between the 1 st space 13a and the 2 nd space 13 b.
With this configuration, the costs of the refrigeration apparatus 10 and the refrigerant detection sensor 30 can be reduced.
(5-3) modification 1C
In the above-described embodiment, the filter 45A made of the filter material 46 shown in fig. 4A is used in the sensor unit 40. Instead of this, a filter 45B shown in fig. 4B may be used in the sensor unit 40. The filter 45B includes the filter material 46 disposed on the side close to the sensor element 42 and the metal mesh 47 disposed on the side away from the sensor element 42. The mesh, i.e. the opening diameter, of the metal mesh 47 is larger than the diameter of the pores of the filter material 46. The wire mesh 47 helps to remove foreign matters having a large diameter, and the filter material 46 helps to remove foreign matters having a small diameter and moisture.
The structure of the sensor unit 40 used in the present modification is specifically shown in fig. 5D. Fig. 5D shows a structure in which the filter 45B of fig. 4B is mounted on the sensor unit 40A of fig. 3A instead of the hatched rectangle.
According to this configuration, the gas outside the refrigerant detection sensor 30 reaches the metal mesh 47 before passing through the filter member 46. Therefore, the metal mesh 47 can inhibit the movement of solid particles and the like contained in the gas, thereby suppressing damage to the filter material 46.
< embodiment 2 >
(1) Form a
Fig. 8 shows a refrigerant detection sensor 30B mounted on the refrigeration apparatus 10 according to embodiment 2 of the present invention. The refrigerant detection sensor 30B is different from the refrigerant detection sensor 30A mounted on the refrigeration apparatus 10 according to embodiment 1 in that the sensor cartridge 31 has the sensor cartridge partition portion 34.
The sensor cartridge partition 34 partitions the sensor cartridge inner space into a 1 st sensor cartridge inner space C1 and a 2 nd sensor cartridge inner space C2. The sensor cartridge partition 34 may be formed integrally with the sensor cartridge 31 or may be formed separately. The sensor cartridge partition 34 is in contact with the filter 45.
(2) Construction of the sensor unit 40
The sensor unit 40 of fig. 8 has a configuration specifically shown in fig. 5A, that is, the filter 45A of fig. 4A is mounted in the sensor unit 40A of fig. 3A instead of the hatched rectangle.
(3) Feature(s)
The sensor cartridge internal space is partitioned into a 1 st sensor cartridge internal space C1 and a 2 nd sensor cartridge internal space C2 by the sensor cartridge partition 34. Since the refrigerant gas receives resistance due to pressure loss when passing through the filter 45, the refrigerant gas does not easily pass through one of the 1 st sensor case internal space C1 and the 2 nd sensor case internal space C2 to reach the other. Therefore, the refrigerant gas can be suppressed from moving from one of the 1 st opening 32a and the 2 nd opening 32b to the other without passing through the sensor element 32, whereby the detection accuracy of the refrigerant gas can be improved.
(4) Modification example
(4-1) modification 2A
In the above-described embodiment, the sensor unit 40 has the structure shown in fig. 3A. Instead, the sensor unit 40 may have the structure shown in fig. 3B. The sensor unit 40B shown in fig. 3B has a sensor-cover dividing portion 43 that divides the internal space of the sensor cover 41 into a 1 st sensor-cover internal space V1 and a 2 nd sensor-cover internal space V2, unlike the sensor unit 40A.
Fig. 5B specifically shows the structure of the sensor unit 40B used in the present modification. Fig. 5B shows a structure in which the filter 45A of fig. 4A is mounted in fig. 3B instead of the hatched rectangle.
With this configuration, the sensor-housing internal space is divided into the 1 st sensor-housing internal space V1 and the 2 nd sensor-housing internal space V2 by the sensor-housing partition 43. Therefore, the refrigerant gas can be suppressed from moving from one of the 1 st opening 32a and the 2 nd opening 32b to the other without passing through the sensor element 32, whereby the detection accuracy of the refrigerant gas can be further improved.
(4-2) modification 2B
Alternatively, the sensor unit 40 may have the structure shown in fig. 3C. In the sensor unit 40C shown in fig. 3C, the sensor element 42a and the sensor element 42B are arranged in the 1 st sensor-cover internal space V1 and the 2 nd sensor-cover internal space V2, respectively, which is different from the sensor unit 40B.
Fig. 5C specifically shows the structure of the sensor unit 40C used in the present modification. Fig. 5C shows a structure in which the filter 45A of fig. 4A is mounted in fig. 3C instead of the hatched rectangle.
With this configuration, the sensor elements 42a and 42b are disposed in the 1 st sensor-housing internal space V1 and the 2 nd sensor-housing internal space V2, respectively. Therefore, the detection performance of 1 sensor element can be used for all of the 1 st sensor-cover internal space V1 and the 2 nd sensor-cover internal space V2, respectively, whereby the detection accuracy of the refrigerant gas can be improved.
(4-3) modification 2C
In the above-described embodiment, the filter 45A made of the filter material 46 shown in fig. 4A is used for the sensor unit 40. Instead, the filter 45B shown in fig. 4B may be used in the sensor unit 40. The filter 45B includes the filter material 46 disposed on the side close to the sensor element 42 and the metal mesh 47 disposed on the side away from the sensor element 42. The mesh, i.e. the openings, of the metal mesh 47 have a larger diameter than the pores of the filter material 46. The wire mesh 47 helps to remove foreign matters having a large diameter, and the filter material 46 helps to remove foreign matters having a small diameter and moisture.
Fig. 5D specifically shows the structure of the sensor unit 40 used in the present modification. Fig. 5D shows a structure in which the filter 45B of fig. 4B is mounted on the sensor unit 40A of fig. 3A instead of the hatched rectangle.
Or may have the structure shown in fig. 5E or the structure shown in fig. 5F instead of the structure of fig. 5D. Fig. 5E shows a structure in which the sensor unit 40B of fig. 3B is mounted with the filter 45B of fig. 4B instead of the hatched rectangle. Fig. 5F shows a structure in which the filter 45B of fig. 4B is mounted on the sensor unit 40C of fig. 3C instead of the hatched rectangle.
According to this configuration, the gas outside the refrigerant detection sensor 30 reaches the metal mesh 47 before passing through the filter member 46. Therefore, the metal mesh 47 can inhibit the movement of solid particles and the like contained in the gas, thereby suppressing damage to the filter material 46.
(4-4) modification 2D
Alternatively, in the sensor unit 40, a filter 45C shown in fig. 4C may be used instead of the filter 45B shown in fig. 4B. The filter 45C has a filter partition 48, which is different from the filter 45B. The filter partition 48 partitions the filter internal space defined by the filter material 46 and the metal mesh 47 into a 1 st filter internal space F1 communicating with the 1 st opening 32a and a 2 nd filter internal space F2 communicating with the 2 nd opening 32 b.
Fig. 5G specifically shows the structure of the sensor unit 40 used in the present modification. Fig. 5G shows a structure in which the filter 45C of fig. 4C is mounted on the sensor unit 40A of fig. 3A instead of the hatched rectangle.
Or may have the structure shown in fig. 5H or the structure shown in fig. 5I instead of the structure of fig. 5G. Fig. 5H shows a structure in which the filter 45C of fig. 4C is mounted on the sensor unit 40B of fig. 3B instead of the hatched rectangle. Fig. 5I shows a structure in which the sensor unit 40C of fig. 3C is mounted with the filter 45C of fig. 4C instead of the hatched rectangle.
With this configuration, the filter internal space is divided into the 1 st filter internal space F1 and the 2 nd filter internal space F2 by the filter partition 48. Therefore, the refrigerant gas can be suppressed from moving from one of the 1 st opening 32a and the 2 nd opening 32b to the other without passing through the sensor element 32, whereby the detection accuracy of the refrigerant gas can be further improved.
(4-5) modification 2E
Alternatively, a filter 45D shown in fig. 4D may be used in the sensor unit 40 instead of the filter 45C shown in fig. 4C. The filter 45D is different from the filter 45C in that the filter partition 48 is exposed to the surface of the filter 45.
Fig. 5J specifically shows the structure of the sensor unit 40 used in the present modification. Fig. 5J shows a structure in which the filter 45D of fig. 4D is mounted on the sensor unit 40A of fig. 3A instead of the hatched rectangle.
Alternatively, the structure shown in fig. 5K or the structure shown in fig. 5L may be provided instead of the structure shown in fig. 5J. Fig. 5K shows a structure in which the filter 45D of fig. 4D is mounted on the sensor unit 40B of fig. 3B instead of the hatched rectangle. Fig. 5L shows a structure in which the sensor unit 40C of fig. 3C is mounted with the filter 45D of fig. 4D instead of the hatched rectangle.
According to this configuration, the sensor cartridge partition 34 and the filter partition 48 are in contact without the metal mesh 47. Therefore, the communication between the 1 st filter internal space F1 and the 2 nd filter internal space F2 can be more surely suppressed, whereby the detection accuracy of the refrigerant gas can be further improved.
(4-6) others
Various modifications of embodiment 1 can be applied to this embodiment.
< embodiment 3 >
(1) Form a
Fig. 9 shows a refrigerant detection sensor 30C mounted on the refrigeration apparatus 10 according to embodiment 3 of the present invention. The refrigerant detection sensor 30C is different from the refrigerant detection sensor 30B mounted in the refrigeration apparatus 10 according to embodiment 2 in that most of the area of the sensor unit 40 is disposed outside the internal space of the sensor case.
The sensor case 31 is provided with a hole 35. The filter 45 of the sensor unit 40 is disposed in the hole. The sensor case inner space faces the filter 45. The sensor cartridge partition 34 is in contact with the filter 45.
(2) Construction of the sensor unit 40
As in embodiment 2 and its modified example, the sensor unit 40 may have a structure as shown in any one of fig. 5A to 5K, for example.
(3) Feature(s)
According to this configuration, the sensor case 31 does not need to be provided with the circuit board 37. Therefore, the refrigerant detection sensor 30C is easily assembled.
< embodiment 4 >
(1) Form a
Fig. 10 shows a refrigerant detection sensor 30D mounted on the refrigeration apparatus 10 according to embodiment 4 of the present invention. The refrigerant detection sensor 30D is different from the refrigerant detection sensor 30C mounted in the refrigeration apparatus 10 according to embodiment 3 in that a partial region of the sensor unit 40 is disposed outside the internal space of the sensor case. That is, the sensor cover 41 is disposed both outside and inside the space inside the sensor case.
(2) Construction of the sensor unit 40
As in embodiment 2 and its modified example, the sensor unit 40 may have a structure as shown in any one of fig. 5A to 5K, for example.
(3) Feature(s)
According to this configuration, the sensor case 31 does not need to be provided with the circuit board 37. Therefore, the refrigerant detection sensor 30C is easily assembled. In addition, compared to the refrigerant detection sensor 30C of embodiment 3, the installation strength of the sensor cartridge 31 and the sensor unit 40 can be further ensured.
< embodiment 5 >
(1) Form a
Fig. 11 shows a refrigerant detection sensor 30E mounted on the refrigeration apparatus 10 according to embodiment 5 of the present invention. The refrigerant detection sensor 30E is different from the refrigerant detection sensor 30A mounted on the refrigeration apparatus 10 according to embodiment 1 in that it has 2 sensor units 401 and 402. That is, the sensor unit 401 is mounted on the 1 st surface S1 of the circuit board 37, and the sensor unit 402 is mounted on the 2 nd surface S2 opposite to the 1 st surface S1. The filter 451 is provided in the sensor unit 401, and the filter 452 is provided in the sensor unit 402.
The circuit substrate 37 and the circuit substrate support 33 partition the sensor cartridge interior space into a 1 st sensor cartridge interior space C1 and a 2 nd sensor cartridge interior space C2. The 1 st opening 32a is provided on the 1 st surface S1 side of the circuit board 37. The 2 nd opening 32b is provided on the 2 nd surface S2 side of the circuit board 37.
(2) Construction of the sensor unit 40
The structure of the sensor unit 40 of fig. 11 is specifically shown in fig. 5A. Fig. 5A shows a structure in which the sensor unit 40A of fig. 3A is mounted with the filter 45A of fig. 4A instead of the hatched rectangle.
Or may have the structure shown in fig. 5D instead of the structure of fig. 5A. Fig. 5D shows a structure in which the filter 45B of fig. 4B is mounted on the sensor unit 40A of fig. 3A instead of the hatched rectangle.
(3) Feature(s)
With this configuration, the sensor units 401 and 402 are disposed in the 1 st and 2 nd sensor case internal spaces C1 and C2 partitioned by the circuit board 37, respectively. Therefore, the detection performance of 1 sensor element can be used for all of the 1 st sensor cartridge internal space C1 and the 2 nd sensor cartridge internal space C2, respectively, whereby the detection accuracy of the refrigerant gas can be improved.
Description of the symbols
10 refrigeration device
11 casing
12 casing partition
13a 1 st space
13b 2 nd space
30 refrigerant detection sensor
31 sensor box
32a 1 st opening
32b No. 2 opening part
34 sensor cartridge divider
37 Circuit board
40 sensor unit
41 sensor cover
42 sensor element
43 sensor cover partition
45 filter
C1 sensor 1 st box inner space
C2 2 nd sensor box inner space
F1 Filter 1 internal space
F2 Filter 2 internal space
V1 sensor cover 1
V2 2 nd sensor cover inner space
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2002-257767
Claims (9)
1. A refrigerant detection sensor (30, 30A, 30B, 30C, 30D, 30E) that detects the presence of flammable refrigerant gas in a 1 st detection target space (13a) and a 2 nd detection target space (13B), wherein the sensor comprises:
at least 1 sensor element (42) configured to detect the refrigerant gas,
a filter (45) arranged in the vicinity of the at least 1 sensor element,
a sensor cover (41) for guiding the refrigerant gas having passed through the filter to the at least 1 sensor element, and
a sensor cartridge (31) having a sensor cartridge interior space facing or containing at least one of the filter and the sensor cover,
the sensor cartridge is formed with a 1 st opening (32a) communicating with the 1 st detection target space and a 2 nd opening (32b) communicating with the 2 nd detection target space.
2. The refrigerant detection sensor (30B, 30C, 30D) of claim 1,
the sensor cartridge has a sensor cartridge partition (34) in contact with the filter,
the sensor cartridge partition section partitions the sensor cartridge internal space into a 1 st sensor cartridge internal space (C1) communicating with the 1 st opening portion and a 2 nd sensor cartridge internal space (C2) communicating with the 2 nd opening portion.
3. The refrigerant detection sensor (30E) of claim 1,
the sensor further includes: a circuit board (37) having a 1 st surface (S1) and a 2 nd surface (S2) opposite to the 1 st surface,
the at least 1 sensor element includes a 1 st sensor element (42a) mounted on the 1 st surface and a 2 nd sensor element (42b) mounted on the 2 nd surface,
the circuit substrate divides the sensor case inner space into a 1 st sensor case inner space (C1) communicating with the 1 st opening part and a 2 nd sensor case inner space (C2) communicating with the 2 nd opening part,
the 1 st sensor element is disposed in the 1 st sensor case internal space, and the 2 nd sensor element is disposed in the 2 nd sensor case internal space.
4. The refrigerant detection sensor (30, 30A, 30B, 30C, 30D) according to claim 1 or 2, wherein,
the sensor cover has a sensor cover partition (43) in contact with the filter,
the sensor cover partition section partitions a sensor cover internal space defined by the sensor cover into a 1 st sensor cover internal space (V1) communicating with the 1 st opening and a 2 nd sensor cover internal space (V2) communicating with the 2 nd opening.
5. The refrigerant detection sensor as recited in claim 4, wherein the at least 1 sensor element comprises 1 sensor element extending through the sensor-cap partition and located in both the 1 st sensor-cap interior space and the 2 nd sensor-cap interior space.
6. The refrigerant detection sensor as recited in claim 4, wherein the at least 1 sensor element includes a 1 st sensor element (42a) disposed in the 1 st sensor-cap interior space and a 2 nd sensor element (42b) disposed in the 2 nd sensor-cap interior space.
7. The refrigerant detection sensor according to claim 1 or 2, wherein the filter includes a 1 st filter (46) and a 2 nd filter (47) that is coarser than the 1 st filter, the 1 st filter being disposed closer to the sensor element than the 2 nd filter.
8. The refrigerant detection sensor as recited in claim 7,
the filter has a filter partition (48) in contact with both the 1 st filter and the 2 nd filter,
the filter partition section partitions a filter internal space defined by the 1 st filter and the 2 nd filter into a 1 st filter internal space (F1) communicating with the 1 st opening and a 2 nd filter internal space (F2) communicating with the 2 nd opening.
9. A refrigeration device (10) is provided with:
the refrigerant detecting sensor according to any one of claims 1 to 8,
a housing (11) having a housing interior space, and
a case partition part (12) which partitions the case inner space into a 1 st space (13a) and a 2 nd space (13b),
the refrigeration device is a refrigeration device (10) using the flammable refrigerant gas, wherein,
the 1 st opening of the refrigerant detection sensor communicates with the 1 st space as the 1 st detection target space,
the 2 nd opening of the refrigerant detection sensor communicates with the 2 nd space as the 2 nd detection target space.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-136383 | 2017-07-12 | ||
| JP2017136383A JP6834820B2 (en) | 2017-07-12 | 2017-07-12 | Refrigerant detection sensor and refrigeration equipment using it |
| PCT/JP2018/025756 WO2019013135A1 (en) | 2017-07-12 | 2018-07-06 | Refrigerant detection sensor and refrigeration device using same |
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| Publication Number | Publication Date |
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| CN110869755A CN110869755A (en) | 2020-03-06 |
| CN110869755B true CN110869755B (en) | 2021-03-12 |
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| CN201880045662.7A Active CN110869755B (en) | 2017-07-12 | 2018-07-06 | Refrigerant detection sensor and refrigeration device using same |
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| Country | Link |
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| JP (1) | JP6834820B2 (en) |
| CN (1) | CN110869755B (en) |
| WO (1) | WO2019013135A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11662109B2 (en) | 2019-06-05 | 2023-05-30 | Carrier Corporation | Enclosure for gas detector |
| JP2021127987A (en) * | 2020-01-07 | 2021-09-02 | パナソニックＩｐマネジメント株式会社 | Indoor unit |
| US11326797B2 (en) * | 2020-04-14 | 2022-05-10 | Haier Us Appliance Solutions, Inc. | Gas sensing system for an air conditioner unit |
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| JPH08254515A (en) * | 1995-03-16 | 1996-10-01 | Figaro Eng Inc | Gas sensor |
| WO2015029094A1 (en) * | 2013-08-25 | 2015-03-05 | Masuda Keiji | Leak detecting structure for flammable refrigerant |
| JP2016191504A (en) * | 2015-03-31 | 2016-11-10 | ダイキン工業株式会社 | Heat source unit of refrigeration device |
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| JPS5882660U (en) * | 1981-11-30 | 1983-06-04 | トヨタ自動車株式会社 | Oxygen sensor protective cover |
| JPH0327576U (en) * | 1989-07-25 | 1991-03-19 | ||
| US5879631A (en) * | 1996-04-30 | 1999-03-09 | Manning System, Inc. | Gas detection system and method |
| JP2001093039A (en) * | 1999-09-22 | 2001-04-06 | Sanden Corp | Automatic vending machine |
| JP4596664B2 (en) * | 2001-03-02 | 2010-12-08 | 大阪瓦斯株式会社 | Gas sensor |
| JP2009198154A (en) * | 2007-10-23 | 2009-09-03 | Daikin Ind Ltd | Fluid sensor, refrigerant leakage detection device, refrigeration device, and refrigerant leakage detection method |
| KR20110008888U (en) * | 2010-03-12 | 2011-09-20 | 박장로 | Checking device for piping |
| JP6375639B2 (en) * | 2014-02-21 | 2018-08-22 | ダイキン工業株式会社 | Air conditioner |
| CN204008591U (en) * | 2014-04-23 | 2014-12-10 | 珠海格力电器股份有限公司 | Refrigerant concentration pick-up unit and there is its air-conditioning |
| JP6248898B2 (en) * | 2014-10-31 | 2017-12-20 | ダイキン工業株式会社 | Air conditioner |
| WO2017109847A1 (en) * | 2015-12-22 | 2017-06-29 | 三菱電機株式会社 | Air conditioner |
-
2017
- 2017-07-12 JP JP2017136383A patent/JP6834820B2/en active Active
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2018
- 2018-07-06 WO PCT/JP2018/025756 patent/WO2019013135A1/en active Application Filing
- 2018-07-06 CN CN201880045662.7A patent/CN110869755B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08254515A (en) * | 1995-03-16 | 1996-10-01 | Figaro Eng Inc | Gas sensor |
| WO2015029094A1 (en) * | 2013-08-25 | 2015-03-05 | Masuda Keiji | Leak detecting structure for flammable refrigerant |
| JP2016191504A (en) * | 2015-03-31 | 2016-11-10 | ダイキン工業株式会社 | Heat source unit of refrigeration device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019013135A1 (en) | 2019-01-17 |
| JP2019019998A (en) | 2019-02-07 |
| JP6834820B2 (en) | 2021-02-24 |
| CN110869755A (en) | 2020-03-06 |
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