JP5511898B2 - Dehumidifying device, freezing device, and dehumidifying system - Google Patents

Description

  The present invention relates to a dehumidifying apparatus that performs dehumidification by determining refrigerant leakage, a refrigeration apparatus equipped with the dehumidifying apparatus, and a dehumidifying system that performs dehumidification by determining leakage of refrigerant.

  As a conventional refrigeration apparatus, there is one provided with an apparatus for determining refrigerant leakage. In such a refrigeration system, oxygen concentration detection means is provided on the side or inside of a housing provided in the room, and the refrigerant leaks when the oxygen concentration detection means detects that the oxygen concentration has relatively decreased. Determine. When a signal for determining that the refrigerant has leaked is input, the control unit sounds an alarm sound and stops the operation of the refrigeration apparatus. By operating in this way, a large amount of refrigerant is prevented from flowing out, and performance deterioration of the refrigeration apparatus and compressor failure are prevented (see Patent Document 1).

JP-A-10-115478 (paragraphs [0015]-[0023], FIG. 1-2)

  In the conventional refrigeration apparatus, when the refrigerant leakage is determined, the control unit stops the operation of the refrigeration apparatus, but the refrigerant flows between the start of the refrigerant leakage and the determination of the refrigerant leakage. Resulting in. Since the leaked refrigerant is cooled to a low temperature due to adiabatic expansion, the leaked refrigerant hits the casing and the surrounding wall surface, so that the casing and the surrounding wall surface are rapidly cooled, and the ambient air that comes into contact with the casing and the surrounding wall surface Moisture adheres to the housing and surrounding walls. In particular, when the ambient air is at high humidity, the amount of moisture condensation increases, and moisture adhering to the housing and the surrounding wall surface drops, giving the user an unpleasant feeling. There was a problem. In addition, there is a problem that moisture condenses on other devices provided in the same room and other devices break down.

  The present invention has been made in order to solve the above-described problems, and provides a dehumidifying device for realizing a refrigeration apparatus that does not cause discomfort to the user even when the ambient air is at high humidity. Moreover, the dehumidification apparatus for implement | achieving the freezing apparatus which does not cause failure of another apparatus is obtained.

The dehumidifying device according to the present invention includes at least a refrigerant leakage determination unit that determines whether or not a refrigerant leaks into ambient air, and a humidity reduction unit that reduces the absolute humidity of the ambient air, and the humidity reduction unit includes: When the refrigerant leakage determination means determines that there is a refrigerant leak, the absolute humidity of the ambient air is lowered as compared with the case where the refrigerant leakage determination means does not determine that there is a refrigerant leakage .

  By using the dehumidifying device according to the present invention, it is possible to reduce the amount of moisture condensed on the casing, the surrounding wall surface, and other devices when the refrigerant leaks in a state where the ambient air is in a high humidity state. Therefore, it is possible to realize a refrigeration apparatus that does not cause discomfort to the user even when the ambient air is highly humid. In addition, it is possible to realize a refrigeration apparatus that does not cause other equipment to malfunction.

It is a figure which shows the block diagram of the dehumidification apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the perspective view of the humidity reduction means 5 of the dehumidification apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the flowchart of the dehumidification apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the perspective view of the humidity reduction means 5 of the dehumidification apparatus which concerns on Embodiment 2. FIG. It is a figure which shows the block diagram of the dehumidification apparatus which concerns on Embodiment 3. FIG. It is a figure which shows the flowchart of the dehumidification apparatus which concerns on Embodiment 3. FIG. It is a figure which shows the block diagram of the dehumidification system which concerns on Embodiment 4. FIG. It is a figure which shows the flowchart of the microcomputer 6 of the dehumidification system which concerns on Embodiment 4. FIG.

Hereinafter, a dehumidifier according to the present invention will be described with reference to the drawings.
In addition, although the example mounted in an air conditioner is demonstrated below, it is not limited to the case where it mounts in an air conditioner, You may mount in another refrigeration apparatus. The refrigeration apparatus includes all apparatuses having a refrigeration cycle such as a RAC (room air conditioner), a PAC (package air conditioner), and a refrigerator. Moreover, you may apply not only to a freezing apparatus but the other apparatus which uses a refrigerant | coolant.
Moreover, in each figure, the same code | symbol is attached | subjected to the same member or the same part. Moreover, illustration is abbreviate | omitted suitably about the fine structure. In addition, overlapping descriptions are simplified or omitted as appropriate.

Embodiment 1 FIG.
First, the configuration of the dehumidifier according to Embodiment 1 will be described with reference to FIG. 1 is a block diagram of a dehumidifier according to Embodiment 1. FIG.
As shown in FIG. 1, the dehumidifying device according to Embodiment 1 is provided inside a room-side casing 1 of an air conditioner, and includes a control board 2 that controls the entire air conditioner and a surrounding that detects components of ambient air. It comprises air component detection means 3, notification means 4 that notifies that there is a refrigerant leak, and humidity reduction means 5 that dehumidifies the internal air of the indoor casing 1.

  The control board 2 includes a microcomputer 6 and a memory 7 that is connected to the microcomputer 6 so as to be able to transmit and receive and stores necessary information in advance (the control board 2 corresponds to “refrigerant leakage determination means” in the present invention). To do.)

The ambient air component detection means 3 is composed of an oxygen concentration detection means 8. The oxygen concentration detection means 8 detects the oxygen concentration of the ambient air and transmits a detection signal to the microcomputer 6.
In the microcomputer 6, an elapsed time from the previous detection (hereinafter, this elapsed time is referred to as "elapsed time after detection") is set in advance (hereinafter, this time is referred to as "detection interval setting time"). ), The oxygen concentration detected by the oxygen concentration detector 8 is input.
Further, the microcomputer 6 continuously counts that the input oxygen concentration is determined to be less than or equal to a preset threshold value (hereinafter, this threshold value is referred to as “discrimination threshold value”). "The number of times of continuous discrimination") is counted, and the refrigerant is leaking when the number of times of continuous discrimination exceeds a preset number (hereinafter, this number is referred to as "leakage determination setting number"). judge.

The number of leak determination setting times is set to 16 times, for example, in order to cope with variations in detection signals in the oxygen concentration detection means 8 and the influence of noise. If this number is extremely reduced, the frequency of erroneously determining that the refrigerant is leaking increases.
The detection interval setting time is set to 5 seconds, for example, to cope with an increase in processing load in the microcomputer 6 and fluctuations in the detection signal in the oxygen concentration detection means 8 when a large noise occurs. If this time is extremely shortened, the processing load of the microcomputer 6 increases and processing delay of other control occurs. Further, the frequency of erroneously determining that the refrigerant is leaking when large noise is generated increases.

  When the microcomputer 6 determines that the refrigerant is leaking, the notification means 4 receives a leak determination signal from the microcomputer 6 and, for example, sounds an alarm sound such as a buzzer, and the resident has a refrigerant leak. Inform you. Residents who have been informed of the leakage of refrigerant call the manufacturer's service center to notify them of the failure, and perform operations such as opening windows to ventilate and unplug electrical outlets.

  When the microcomputer 6 determines that the refrigerant is leaking, the humidity reducing means 5 receives a leakage determination signal from the microcomputer 6 and dehumidifies the internal air of the indoor housing 1. The humidity reducing means 5 may be provided in a gap inside the indoor housing 1. Moreover, since the leaked refrigerant is heavier than the ambient air, it is preferable that the leaked refrigerant is provided below ½ of the total height.

Next, a specific configuration of the humidity reducing means 5 will be described with reference to FIG. FIG. 2 is a perspective view of the humidity reducing means 5 of the dehumidifier according to Embodiment 1. FIG.
As shown in FIG. 2, the humidity reducing means 5 includes an adsorbent container 9 that encloses and stores an adsorbent that adsorbs moisture in ambient air, a dish 10 that receives the adsorbent spilled from the adsorbent container 9, And a solenoid 11 for taking in and out the core 12 having a blade 13 attached to the tip. Examples of the adsorbent include silica gel, quicklime, calcium chloride, zeolite, and clay-type desiccant.

  When the microcomputer 6 determines that the refrigerant is leaking, the solenoid 11 receives a leakage determination signal from the microcomputer 6 and protrudes the lead 12. A blade 13 attached to the tip of the core 12 pierces an opening provided on the side surface of the adsorbent container 9. Since the opening is thinner than other parts of the adsorbent container 9 and is easily broken, the blade 13 is easily pierced. Thereafter, the microcomputer 6 pulls the core 12 of the solenoid 11 back to the original position. By making a hole in the opening, the adsorbent sealed inside the adsorbent container 9 falls down and spreads on the dish 10. The adsorbent adsorbs moisture in the ambient air and reduces the humidity of the ambient air.

In general, silica gel has an adsorption rate of 35% at a relative humidity of 90%, an adsorption rate of 25% at a relative humidity of 50%, and an adsorption rate of about 12% at a relative humidity of 20%. That is, at a relative humidity of 50%, 100 g of silica gel can adsorb 25 g of water. For example, if the relative humidity when the relative humidity is 80% at temperature 35 ° C. to absorb moisture so that the 50%, it is sufficient to adsorb 8.6 g / m ³ or more moisture, if the space is 1 m ³ Requires 35 g or more of silica gel. In the case of an air conditioner indoor unit, since the internal volume is about 0.1 m ³ , 4 g or more of silica gel is required.

Next, the operation of the dehumidifier according to Embodiment 1 will be described with reference to FIG. FIG. 3 is a diagram illustrating a flowchart of the dehumidifying device according to the first embodiment.
In S301, power is supplied to the microcomputer 6, and the microcomputer 6 starts the refrigerant leakage determination operation.
In S302, the microcomputer 6 sets the leakage determination setting number N, the detection interval setting time T, and the determination threshold Th, and initializes the continuous determination number n and the post-detection elapsed time t. The leakage determination setting number N is set to 16 times, for example. The detection interval setting time T is set to 5 seconds, for example.
In S303, the microcomputer 6 receives the oxygen concentration of the ambient air detected by the oxygen concentration detector 8, and proceeds to S304.
In S304, the microcomputer 6 determines whether or not the oxygen concentration detected in S303 is equal to or less than the determination threshold Th. If the oxygen concentration is greater than the discrimination threshold Th, the process proceeds to S305. If the oxygen concentration is less than or equal to the discrimination threshold Th, the process proceeds to S307.
In S305, the microcomputer 6 resets the continuous determination number n, and proceeds to S306.
In S306, the microcomputer 6 waits for the post-detection elapsed time t to be equal to or greater than the detection interval set time T, and when it is equal to or greater than the detection interval set time T, resets t, proceeds to S303, and repeats thereafter.
In S307, the microcomputer 6 increments the continuous determination number n by 1, and proceeds to S308.
In S308, the microcomputer 6 determines whether or not the continuous determination number n is equal to or greater than the leakage determination set number N. If it is smaller than the leakage determination set number N, the process proceeds to S306 and is repeated thereafter. If it is greater than or equal to the leakage determination setting number N, the process proceeds to S309.
In S309, the microcomputer 6 determines that the refrigerant is leaking, and proceeds to S310.
In S310, the microcomputer 6 transmits a leakage determination signal to the solenoid 11, and causes the solenoid 12 to perform the adsorbent outflow operation. Further, the microcomputer 6 transmits a leakage determination signal to the notification unit 4 to cause the notification unit 4 to perform a notification operation.

  As described above, the dehumidifying apparatus according to Embodiment 1 operates the humidity reducing unit 5 when it is determined that the refrigerant has leaked. By configuring in this way, it becomes possible to reduce the humidity inside and around the indoor casing 1 where the leaked refrigerant exists, and moisture condensing on the indoor casing 1, the peripheral wall surface, and other devices The amount of can be reduced.

Generally, when the refrigerant leaks and the compressed refrigerant is released into the atmosphere, the temperature of the refrigerant decreases due to adiabatic expansion. At that time, the coolant leakage port, the wall surface on which the coolant is sprayed, and the housing of the device are cooled, moisture in the ambient air is condensed, and adheres to the wall surface and the housing. For example, when the ambient air temperature is 35 ° C. and the relative humidity is 80%, the wall surface is cooled by the leaked refrigerant and the surface temperature is lowered to 25 ° C. Since the absolute humidity, when the temperature is relative humidity of 80% at 35 ℃, 31.7g / m ^3, when the relative humidity is 100% at temperature of 25 ° C., it is 23.1 g / m ^3, 8.6 (= 31.7-23.1) g / m ³ of water will condense and adhere to the wall surface. As a result, the wall surface gets wet and the user performs a process such as wiping, which causes discomfort. In addition, moisture condensed on other equipment provided in the room causes a failure.
On the other hand, when the dehumidifying apparatus according to Embodiment 1 is applied, for example, by operating the humidity reducing means 5 in a state where the temperature of the ambient air is 35 ° C. and the relative humidity is 80%, the temperature of the ambient air Is 35 ° C. and the relative humidity is 50%. And the absolute humidity in that case is 19.8 g / m ³ , and even if the temperature of the wall surface is lowered to 25 ° C., the absolute humidity when the temperature is 25 ° C. and the relative humidity is 100% is 23.1 g. / M ³ , the moisture in the surrounding air does not become saturated water vapor and does not condense on the wall surface. That is, there is no need for the user to wipe the wall, and there is no discomfort. In addition, since no condensation occurs in other equipment provided in the room, it does not cause a failure.

  In particular, the dehumidifying apparatus according to Embodiment 1 is applied to an apparatus that uses a refrigerant, and the apparatus is, for example, a gas / petroleum product (a stove, a water heater, a fan heater, a stove, etc.), a household appliance (a fish grill, electric Heater, IH, rice cooker, toaster, microwave oven, electric stove, vacuum cleaner, washing machine, dryer, hand jet towel, etc.), electric / gas tools (electric drill, welding torch, etc.), etc. It is more effective when used in a space provided with.

  In the dehumidifying apparatus according to the first embodiment, the oxygen concentration detection means 8 is used as the ambient air component detection means 3. However, the present invention is not limited to this. For example, the leakage of the refrigerant is detected by a different principle such as a gas sensor. Other detection means may be used. When the oxygen concentration detecting means 8 is used, the cost can be further reduced.

In the dehumidifying apparatus according to the first embodiment, the oxygen concentration detected by the oxygen concentration detection unit 8 is compared with the discrimination threshold Th, but the refrigerant concentration is obtained from the oxygen concentration detected by the oxygen concentration detection unit 8. The refrigerant concentration may be compared with the discrimination threshold Th.
In such a case, the same determination threshold value Th can be used regardless of the type of refrigerant used. Therefore, when the refrigerant used is changed or between air conditioners using different refrigerants. This is convenient when you want to share control.
That is, for example, when HFO1234yf is used as the refrigerant, the oxygen concentration is 19.6 vol% when the refrigerant concentration is 6.5 vol%, whereas when R32 is used as the refrigerant, the refrigerant The refrigerant concentration when the oxygen concentration is substantially the same is different for each type of refrigerant used so that the oxygen concentration is 18.0 vol% when the concentration is 14.4 vol%. Therefore, when comparing the oxygen concentration with the discrimination threshold Th, it is necessary to set the discrimination threshold Th for each type of refrigerant used. On the other hand, when comparing the refrigerant concentration with the discrimination threshold Th, However, it is not necessary to set the discrimination threshold Th for each type of refrigerant used.
When the refrigerant concentration is compared with the discrimination threshold Th, the relationship between the oxygen concentration and the refrigerant concentration is tabulated in advance and stored in the memory 7, thereby facilitating conversion from the oxygen concentration to the refrigerant concentration. Can do. The table is preferably created for each type of refrigerant used. The microcomputer 6 uses a table corresponding to the refrigerant used. The manufacturer selects which table to select at the time of factory shipment. In addition, it is advantageous to enable resetting after factory shipment with a hidden key or the like that requires specific complicated key operations. In this way, for example, it is possible to cope with a case where the refrigerant used in the country or region is different or the refrigerant used is changed depending on the age.

  Moreover, the refrigerant | coolant used as the object of determination with the dehumidification apparatus which concerns on Embodiment 1 is not limited to HFO1234yf or R32, For example, difluoromethane (CH2F2: R32), tetrafluoropropane (CF3CF = CH2: HFO-1234yf), Propane (R290), propylene (R1270), ethane (R170), butane (R600), isobutane (R600a), 1.1.1.2-tetrafluoroethane (C2H2F4: R134a), pentafluoroethane (C2HF5: R125) , 1.3.3.3-tetrafluoro-1-propene (CF3-CH = CHF: HFO-1234ze) or the like, or a mixed refrigerant composed of two or more refrigerants is included.

  In the dehumidifying apparatus according to Embodiment 1, the humidity reducing means 5 is installed inside the indoor housing 1, but may be installed inside the outdoor housing. Moreover, you may install not indoors but a room | chamber interior. In that case, a large amount of adsorbent is required, but condensation can be suppressed when the room is small.

  Moreover, although the dehumidification apparatus which concerns on Embodiment 1 has shown the case where one opening is provided in the side surface of the adsorbent container 9, a several opening may be provided. Similarly, a plurality of solenoids 11 are provided, and the microcomputer 6 transmits a leakage determination signal to the plurality of solenoids 11, and the blade 13 is pierced at a plurality of locations. By comprising in this way, the outflow of adsorbent can be accelerated.

  In the humidity reducing means 5 in the dehumidifying apparatus according to Embodiment 1, a fan such as a fan may be installed around the dish 10. By comprising in this way, it becomes possible to apply | coat a wind to adsorption agent and to accelerate | stimulate adsorption | suction of a water | moisture content.

  Moreover, in the dehumidification apparatus which concerns on Embodiment 1, although the alerting | reporting means 4 has alert | reported that there exists a refrigerant | coolant leak, you may alert | report that there is no refrigerant | coolant leak and there exists a refrigerant | coolant leak. Both may be notified.

  Further, the notification means 4 in the dehumidifying apparatus according to the first embodiment may be other than an alarm sound such as a buzzer, and may be, for example, a sound from a speaker, blinking of an LED light, display of a message on a liquid crystal screen, and the like. You may combine.

Embodiment 2. FIG.
The dehumidifying device according to the second embodiment is different from the dehumidifying device according to the first embodiment only in the humidity reducing means 5. Other configurations, operations, and effects of the dehumidifying apparatus according to the second embodiment are the same as those of the dehumidifying apparatus according to the first embodiment, and thus description thereof is omitted. In addition, the description which overlaps with the dehumidification apparatus which concerns on Embodiment 1 is simplified or abbreviate | omitted suitably.
The humidity reducing means 5 of the dehumidifying apparatus according to Embodiment 2 will be described with reference to FIG. FIG. 4 is a view showing a perspective view of the humidity reducing means 5 of the dehumidifying apparatus according to the second embodiment.
As shown in FIG. 4, the humidity reducing means 5 includes an adsorbent container 9 that encloses and stores an adsorbent that adsorbs moisture in ambient air, a dish 10 that receives the adsorbent spilled from the adsorbent container 9, And a solenoid 11 for taking in and out the core 12 having a blade 13 attached to the tip.

  When the solenoid 6 determines that the refrigerant is leaking, the solenoid 11 receives a leakage determination signal from the microcomputer 6 and pulls the lead 12 back. The blade 13 attached to the tip of the core 12 is embedded in an opening provided on the side surface of the adsorbent container 9, and the blade 13 is pulled out by pulling the core 12 back, and a hole is opened in the opening. By making a hole in the opening, the adsorbent sealed inside the adsorbent container 9 falls down and spreads on the dish 10. The adsorbent adsorbs moisture in the ambient air and reduces the humidity of the ambient air.

Embodiment 3 FIG.
The dehumidifying apparatus according to Embodiment 1 and Embodiment 2 operates the humidity reducing means 5 when it is determined that the refrigerant has leaked. On the other hand, in the dehumidifying apparatus according to Embodiment 3, the number of operating humidity reducing means 5, that is, the dehumidifying amount is controlled according to the humidity of the surrounding air.
First, the configuration of the dehumidifier according to Embodiment 3 will be described with reference to FIG. FIG. 5 is a block diagram of a dehumidifying device according to Embodiment 3. In addition, the description which overlaps with the dehumidification apparatus which concerns on Embodiment 1 and Embodiment 2 is simplified or abbreviate | omitted suitably.
As shown in FIG. 5, the dehumidifying device according to the third embodiment is different from the dehumidifying devices according to the first and second embodiments in the absolute humidity detecting unit 14 and the plurality of humidity reducing units 5-1 to 5-1. The difference is that 5-n is provided.

The absolute humidity detection unit 14 includes a temperature detection unit 15 and a relative humidity detection unit 16. The temperature detection means 15 is a thermistor element, for example. The relative humidity detector 16 is, for example, a relative hygrometer. The temperature detection means 15 and the relative humidity detection means 16 detect the temperature and relative humidity of the ambient air, and send detection signals to the microcomputer 6.
The microcomputer 6 calculates the absolute humidity of the ambient air from the received temperature and relative humidity.

Next, the operation of the dehumidifier according to Embodiment 3 will be described with reference to FIG. FIG. 6 is a diagram illustrating a flowchart of the dehumidifying apparatus according to the third embodiment.
In S601, power is supplied to the microcomputer 6, and the microcomputer 6 starts a refrigerant leakage determination operation.
In S602, the microcomputer 6 sets the leakage determination setting number N, the detection interval setting time T, and the determination threshold Th, and initializes the continuous determination number n and the post-detection elapsed time t.
In S603, the microcomputer 6 receives the oxygen concentration of the ambient air detected by the oxygen concentration detector 8, and proceeds to S604.
In S604, the microcomputer 6 determines whether or not the oxygen concentration detected in S603 is equal to or less than the determination threshold Th. When the oxygen concentration is larger than the determination threshold Th, the process proceeds to S605. If the oxygen concentration is less than or equal to the discrimination threshold Th, the process proceeds to S607.
In S605, the microcomputer 6 resets the continuous determination number n, and proceeds to S606.
In S606, the microcomputer 6 waits for the post-detection elapsed time t to be equal to or greater than the detection interval set time T. If the microcomputer 6 exceeds the detection interval set time T, the microcomputer 6 resets t, proceeds to S603, and repeats thereafter.
In S607, the microcomputer 6 increments the continuous determination number n by 1, and proceeds to S608.
In step S <b> 608, the microcomputer 6 determines whether the continuous determination number n is equal to or greater than the leakage determination setting number N. If it is smaller than the leakage determination set number N, the process proceeds to S606 and is repeated thereafter. If it is greater than or equal to the leakage determination setting number N, the process proceeds to S609.
In S609, the microcomputer 6 determines that the refrigerant is leaking, and proceeds to S610.
In step S610, the microcomputer 6 receives the ambient air temperature and relative humidity detected by the temperature detection unit 15 and the relative humidity detection unit 16, and proceeds to step S611.
In S611, the microcomputer 6 calculates the absolute humidity of the ambient air from the temperature and relative humidity of the ambient air, and proceeds to S612.
In S612, the microcomputer 6 determines the operating number of the humidity reducing means 5 according to the obtained absolute humidity, and proceeds to S613.
In step S613, the microcomputer 6 transmits a leakage determination signal to the solenoid 11 that has been determined to operate, and causes the solenoid 11 to perform the adsorbent outflow operation. Further, the microcomputer 6 transmits a leakage determination signal to the notification unit 4 to cause the notification unit 4 to perform a notification operation.

  As described above, the dehumidifying apparatus according to Embodiment 3 controls the number of operating units of the humidity reducing means 5 according to the humidity of the surrounding air. By configuring in this way, it is possible to suppress the waste of the humidity lowering means 5, and it is possible to cope with an increase in the amount of condensation due to the high humidity of the surrounding air at a low cost. It becomes possible.

  In addition, although the dehumidification apparatus which concerns on Embodiment 3 controls the dehumidification amount according to humidity, you may control the dehumidification amount according to the leakage amount of a refrigerant | coolant. In that case, the dehumidifying amount is determined based on the oxygen concentration of the ambient air detected by the oxygen concentration detecting means 8. Further, it may be based on both humidity and leakage amount.

  Further, the temperature detecting means 15 and the relative humidity detecting means 16 in the dehumidifying apparatus according to the third embodiment may be used both as the temperature detecting means and the relative humidity detecting means used for air conditioning of the air conditioner. You don't have to.

  Further, the temperature detecting means 15 and the relative humidity detecting means 16 in the dehumidifying apparatus according to the third embodiment may be used both as the temperature detecting means and the relative humidity detecting means used for air conditioning of the air conditioner. You don't have to.

  In the dehumidifying apparatus according to Embodiment 3, the absolute humidity of the ambient air is calculated from the ambient air temperature and the relative humidity, but the relationship between the ambient air temperature, the relative humidity, and the absolute humidity of the ambient air is determined in advance. A table may be stored in the memory 7, and the absolute humidity of the ambient air may be obtained using the table.

Embodiment 4 FIG.
The dehumidifying device according to the first to third embodiments is provided inside the device itself that leaks the refrigerant, and dehumidifies the inside of the device housing when it is determined that the refrigerant is leaked. In contrast, the dehumidification system according to Embodiment 4 uses an existing dehumidifier provided in another device different from the device that leaks the refrigerant, and when it is determined that there is a refrigerant leak, Dehumidify the air.
First, the structure of the dehumidification system which concerns on Embodiment 4 is demonstrated using FIG. FIG. 7 is a block diagram of a dehumidification system according to Embodiment 4. In addition, the description which overlaps with the dehumidification apparatus which concerns on Embodiment 1 thru | or Embodiment 3 is simplified or abbreviate | omitted suitably.
As shown in FIG. 7, the dehumidifying system according to the fourth exemplary embodiment is that the humidity reducing unit 5 is a humidity reducing unit 18 provided in another device 17 with respect to the dehumidifying apparatus according to the third exemplary embodiment. Is different.

  The other device 17 may be any device having a dehumidifying function other than the device that leaks the refrigerant, such as a second air conditioner or a dehumidifier. Further, the other device 17 includes a ventilation fan. In that case, it is necessary to determine whether or not it is effective by obtaining the humidity difference between the room and the outside air, but if the humidity of the outside air is low, the dehumidifying function is exhibited. Whether it is valid or not may be determined by detecting the humidity of the room and outside air with a hygrometer, or may be determined by season or weather without using the hygrometer. Moreover, in the case of a room having a kitchen, it may be determined from the use record of the stove.

Next, the operation of the microcomputer 6 in the dehumidification system according to Embodiment 4 will be described with reference to FIG. FIG. 8 is a diagram illustrating a flowchart of the microcomputer 6 in the dehumidification system according to the fourth embodiment.
In step S801, power is supplied to the microcomputer 6, and the microcomputer 6 starts a refrigerant leakage determination operation.
In S <b> 802, the microcomputer 6 sets the leakage determination setting number N, the detection interval setting time T, and the determination threshold Th, and initializes the continuous determination number n and the post-detection elapsed time t.
In S803, the microcomputer 6 receives the oxygen concentration of the ambient air detected by the oxygen concentration detection means 8, and proceeds to S804.
In S804, the microcomputer 6 determines whether or not the oxygen concentration detected in S803 is equal to or less than the determination threshold Th. If the oxygen concentration is greater than the discrimination threshold Th, the process proceeds to S805. If the oxygen concentration is less than or equal to the discrimination threshold Th, the process proceeds to S807.
In S805, the microcomputer 6 resets the continuous determination number n, and proceeds to S806.
In S806, the microcomputer 6 waits for the post-detection elapsed time t to be equal to or greater than the detection interval set time T. If the microcomputer 6 is equal to or greater than the detection interval set time T, the microcomputer 6 resets t, proceeds to S803, and repeats thereafter.
In S807, the microcomputer 6 increments the continuous determination number n by 1, and proceeds to S808.
In S808, the microcomputer 6 determines whether or not the continuous determination number n is equal to or greater than the leakage determination set number N. If it is smaller than the leakage determination set number N, the process proceeds to S806 and is repeated thereafter. If it is greater than or equal to the leakage determination setting number N, the process proceeds to S809.
In S809, the microcomputer 6 determines that the refrigerant is leaking, and proceeds to S810.
In step S810, the microcomputer 6 receives the ambient air temperature and relative humidity detected by the temperature detection unit 15 and the relative humidity detection unit 16, and proceeds to step S811.
In S811, the microcomputer 6 calculates the absolute humidity of the ambient air from the temperature and relative humidity of the ambient air, and proceeds to S812.
In S812, the microcomputer 6 transmits a dehumidification command to the other device 17. Further, the microcomputer 6 transmits a leakage determination signal to the notification unit 4 to cause the notification unit 4 to perform a notification operation.

  As described above, the dehumidifying system according to the fourth embodiment dehumidifies the room using the humidity reducing means 18 of the other device 17. By comprising in this way, especially the quantity of the water | moisture content which dew condensation on the other apparatus provided indoors can be reduced, and it can suppress making it fail.

In the dehumidifying system according to the fourth embodiment, the absolute humidity is obtained using the absolute humidity detecting means 14 provided in the indoor housing 1, but the other device 17 includes the absolute humidity detecting means. If so, the microcomputer 6 may transmit only the leakage determination signal and obtain the absolute humidity on the other device 17 side.
Further, like the dehumidifying apparatus according to the first embodiment and the dehumidifying apparatus according to the second embodiment, when it is determined that there is a refrigerant leakage, the dehumidifying function of the other device 17 is fully obtained without obtaining the absolute humidity. It may be operated.

  In the dehumidification system according to the fourth embodiment, the ambient air component detection means 3 is provided in the indoor casing 1, but the ambient air component detection means 3 may be provided on the other device 17 side.

  The first to fourth embodiments have been described above, but the present invention is not limited to the description of each embodiment. For example, it is possible to combine each embodiment and each modification.

  DESCRIPTION OF SYMBOLS 1 Indoor side housing | casing 2 Control board 3 Ambient air component detection means 4 Notification means 5 Humidity reduction means 6 Microcomputer 7 Memory 8 Oxygen concentration detection means 9 Adsorbent container 10 Dish 11 Solenoid 12 Core, 13 blades, 14 Absolute humidity detection means, 15 Temperature detection means, 16 Relative humidity detection means, 17 Other equipment, 18 Humidity reduction means.

Claims (14)

Refrigerant leakage determination means for determining the presence or absence of refrigerant leakage to the ambient air;
A humidity reducing means for reducing the absolute humidity of the ambient air, at least,
When the refrigerant leakage determination means determines that there is refrigerant leakage, the humidity lowering means determines the absolute humidity of the ambient air as compared with the case where the refrigerant leakage determination means does not determine that there is refrigerant leakage. Lower ,
A dehumidifying device characterized by that. The humidity reducing means is provided inside a casing of a device that uses a refrigerant.
The dehumidifying device according to claim 1. The humidity lowering means is provided below the housing.
The dehumidifying device according to claim 2. The humidity reducing means is provided in a room where a device using a refrigerant is installed.
The dehumidifying device according to claim 1. The humidity reducing means has an adsorbent that adsorbs moisture.
The dehumidification apparatus as described in any one of Claims 1 thru | or 4 characterized by the above-mentioned. The adsorbent is provided sealed in a container,
The humidity lowering means has an opening means for opening the container after the refrigerant leakage determination means determines that there is refrigerant leakage.
The dehumidifying device according to claim 5. Refrigerant leakage determination means for determining the presence or absence of refrigerant leakage to the ambient air;
A humidity reducing means for reducing the humidity of the ambient air, at least,
The humidity reducing means reduces the humidity after the refrigerant leakage determining means determines that there is refrigerant leakage,
The humidity reducing means has an adsorbent that adsorbs moisture,
The adsorbent is provided sealed in a container,
The humidity lowering means has an opening means for opening the container after the refrigerant leakage determination means determines that there is refrigerant leakage.
A dehumidifying device characterized by that. The opening means has a solenoid;
The dehumidifying device according to claim 6 or 7 , characterized in that. Furthermore, an absolute humidity detecting means for detecting the absolute humidity of the ambient air is provided,
The humidity lowering means has a control means for controlling a dehumidification amount according to the absolute humidity detected by the absolute humidity detecting means,
The dehumidifying amount increases as the absolute humidity increases.
The dehumidifying device according to any one of claims 1 to 8 , wherein Furthermore, it comprises ambient air component detection means for detecting the ambient air component,
The humidity lowering means has a control means for controlling a dehumidification amount according to the amount of refrigerant contained in the ambient air detected by the ambient air component detection means,
The amount of dehumidification increases as the amount of refrigerant contained in the ambient air increases.
The dehumidifying device according to any one of claims 1 to 9 , wherein The dehumidifying device according to any one of claims 1 to 10 is provided.
A refrigeration apparatus characterized by that. A refrigeration apparatus at least partially installed indoors;
Another device at least partially installed in the same room as the room,
At least a part of the refrigeration apparatus installed in the room has refrigerant leakage determination means for determining the presence or absence of refrigerant leakage to the ambient air,
The other apparatus has a humidity reducing means for reducing the absolute humidity in the room,
The humidity lowering means lowers the absolute humidity in the room when the refrigerant leak determining means determines that there is a refrigerant leak compared to when the refrigerant leak determining means does not determine that there is a refrigerant leak. To
A dehumidification system characterized by that. The refrigeration apparatus has absolute humidity detection means for detecting the absolute humidity of the ambient air,
The humidity lowering means has a control means for controlling a dehumidification amount according to the absolute humidity detected by the absolute humidity detecting means,
The dehumidifying amount increases as the absolute humidity increases.
The dehumidification system of Claim 12 characterized by the above-mentioned. The refrigeration apparatus has ambient air component detection means for detecting a component of the ambient air,
The humidity lowering means has a control means for controlling a dehumidification amount according to the amount of refrigerant contained in the ambient air detected by the ambient air component detection means,
The amount of dehumidification increases as the amount of refrigerant contained in the ambient air increases.
The dehumidification system of Claim 12 or 13 characterized by the above-mentioned.

Images