TW558625B - Refrigerator - Google Patents

Abstract

This invention provides a refrigerator capable of sensing a valve leakage and removing refuse adhered to a valve mechanism. The present invention relates to a refrigerator that is a refrigerator that switches via a three-way valve 68 in supplying a refrigerant to an R evaporator 34 and an F evaporator 24. In the case of sensing a valve leakage of the three-way valve 68, the three-way valve 68 is forcibly operated to remove refuse thereby releasing the leakage.

Description

558625 _ Case No. 88103850_ Year Month __ V. Description of the invention (1) · [Field of invention] The present invention relates to a refrigerator with two evaporators. [Previous skill] Recently, refrigerators including an evaporator for refrigerating and an evaporator for freezing have been proposed to effectively cool the refrigerating compartment and the freezing compartment, respectively. '' In order to effectively cool the two evaporators with the refrigerant delivered by one compressor, a three-way valve is arranged in the refrigerant passage, and the conversion of the three-way valve determines the cooling. The medium is sent to the refrigerating evaporator or the freezing evaporator. Device. k [Problems to be Solved by the Invention] However, dust is often mixed in the refrigerant passage during manufacture, and sometimes the dust is blocked in the three-way valve, causing the three-way valve to fail to work properly and valve leakage. The so-called valve leakage means that although the three-way valve is converted into a refrigerating evaporator, the refrigerant not only flows to the refrigerating evaporator side and leaks to the refrigerating evaporator side, or vice versa, although it is converted to a refrigerating evaporator, the refrigerant is not only It flows to the evaporator for refrigeration and leaks to the evaporator for freezing. Previous refrigerators were unable to detect this type of valve leakage. Also, the previous refrigerator did not have a structure for removing the dust attached to the three-way valve when such a valve leakage occurred. The present invention has been made in view of the above problems, and provides a refrigerator capable of detecting a valve leak and removing dust adhering to a three-way valve. [Method for solving the problem] The invention of item 1 of the scope of patent application of the present invention is to connect: a compressor, a condenser, a refrigerating throttling mechanism, a refrigerating evaporator corresponding to a refrigerating chamber, a throttling mechanism for freezing, Corresponds to the evaporator for freezing in the freezer compartment, constitutes the refrigerant passage, and can realize: in the refrigerated state, the refrigerant passage is switched by the valve mechanism

0 \ 57 \ 57574-910807.ptc Page 4 558625 Case No. 88103850 Amendment V. Description of Invention (2) The state of road borrowing refrigeration, borrowing a freezer, and including: Evaporator temperature inspection When refrigerated evaporation, it is judged to be a patent-applied refrigerator. Among them, the front evaporator temperature is inspected for refrigerated evaporators and the compressor's evaporator is applied for patent-refrigerators. Among them, the front evaporator temperature is inspected for refrigeration. The evaporator temperature detection mechanism is judged to be a valve-applied refrigerator. Among them, the front evaporator temperature detection and freezing evaporator flow mechanism sends the refrigerant to the throttling mechanism, and the cold judgment valve mechanism cools the refrigerant valve of the refrigerator. The refrigerator described in item 2 has a detection mechanism, and the valve mechanism of the wide temperature detection mechanism has a detection mechanism for the refrigerator described in item 3. The valve leakage temperature detection mechanism has a higher detection frequency than the valve that sets the refrigerant. leak. The refrigerator described in item 4 has a detection and detection mechanism, and the valve leakage temperature detection mechanism detects the refrigerating state. The refrigerator in accordance with item 5 includes a detection and measurement mechanism, and the valve leakage temperature detection mechanism. Detected to the evaporator side for refrigerating; and the valve leakage judging mechanism for the refrigerant of the refrigerant only sent to the evaporator for ice storage of the freezing evaporator. It is the refrigerating leakage judging mechanism such as the refrigerating evaporator temperature in item 1 of the scope of patent application, and the temperature detected in the frozen state reaches the set temperature, and the valve of the refrigerant of the evaporator leaks. For the refrigerating judgment mechanism such as the refrigerating evaporator temperature in item 1 of the scope of patent application, when the temperature measured in the frozen state is below the set temperature, the frequency is judged as the valve mechanism is cold. The refrigerating judgment mechanism of the refrigerating evaporator temperature of item 1, when the temperature difference between the measured temperature and the refrigerating evaporator temperature in the frozen state is within a set temperature range, the valve of the refrigerant of the refrigerating machine is leaking. It is a freezing judgment mechanism such as the temperature of the freezing evaporator according to item 1 of the scope of patent application. In the frozen state, the measured temperature is higher than normal, and

0 \ 57 \ 57574-9! 0807 ptc Page 5 558625 Case No. 88103850 Rev. V. Description of the invention (3) The refrigerating evaporator temperature detection mechanism is within the cooling range of the refrigerating evaporator temperature detection mechanism, ie It is determined that the valve mechanism is leaking. The refrigerator refrigerator under the scope of the patent application No. 6 wherein the foregoing refrigerator has an evaporator temperature detection mechanism, and the valve leak freezing evaporator temperature detection mechanism detects the temperature range of the freezing evaporator temperature detection mechanism. Inside, it is judged that the valve mechanism is leaking. The refrigerator refrigerator of the scope of the patent application No. 7 includes: the valve leak judgment mechanism judges the work to remove the dust of the valve mechanism to apply for the refrigerator scope of the patent scope of the eighth scope of the patent, where the dust removal mechanism increases the frequency of compressor operation Refrigerator of the 9th scope of patent: The refrigerator, in which the dust removing mechanism raises the operating frequency of the compressor on the one hand and stops the valve mechanism. The refrigerator of the refrigerator with the scope of patent application No. 10, in which the dust removal mechanism is shorter than the normal working time when the temperature of the valve machine in the frozen state and the temperature in the refrigerated state are different from the set temperature of the refrigerant in the refrigerated evaporator. The valve is a freezing judgment mechanism such as the temperature of the freezing evaporator according to item 1 of the scope of patent application. The temperature measured in the refrigerated state is lower than the normal temperature, and the temperature in the frozen state is the same as that in the refrigerated state. If the temperature difference reaches the setting of the refrigerant valve to the evaporator for freezing, the valve mechanism will be forced to be removed when the valve leakage is found in the first patent application. When the leakage judging mechanism of item 7 of the patent application determines that the valve is leaking, on the one hand, the valve mechanism is forced to work. When the leakage judging mechanism in item 7 of the patent application determines that the valve is leaking, on the one hand, when switching the refrigerant passage, the valve leakage judging mechanism in item 7 of the patent application determines that the valve leakage structure forces it to work.

〇 \ S7 \ 57574-9! () 807 ptc Page 6 558625 Case No. 88103850 Amendment V. Description of Invention (4) The refrigerator in the 11th scope of the patent application, which is a refrigerator, includes: dust removal mechanism to remove When it is judged that the valve is leaking, a defrosting control mechanism that performs a defrosting operation for evaporation leakage for freezing is performed. The refrigerator in the patent application No. 12 is a refrigerator in which the defrost control mechanism has a defrost operation interval of the ventilator that is longer than the refrigerating evaporator and the valve leakage defrost operation after the defrost operation. Defrost interval from the hair dryer of the refrigerated evaporator. The refrigerator with the scope of patent application No. 1: The valve leakage of the valve shutoff mechanism. When the refrigerator is in the frozen state after applying the second item of patent scope, if the temperature of the evaporator for refrigerating is lower than the detection temperature, it is judged that the valve mechanism is leaking to the refrigerating unit. With the refrigerator with the scope of patent application No. 3, when the temperature of the evaporator temperature for refrigeration is below the detection temperature in the frozen state, and the valve mechanism of the compressor operates at a high frequency, the valve for the refrigerant of the evaporator with refrigeration has the scope of patent application No. 4 In the refrigerator, when the temperature of the evaporator temperature detection mechanism for refrigerating is in the frozen state, the valve mechanism is judged to be leaking to the refrigerating device. For the valve of the regenerator and refrigerating evaporator, if the normal application state of item 11 of the scope of patent control is to control the defrosting operation interval of the evaporation for freezing is short. The judging mechanism can judge, the valve leakage judging mechanism, the valve valve judging mechanism for detecting the temperature of the cooling mechanism to reach the refrigerant for setting the evaporator, and the temperature detected by the cooling mechanism reaching the set frequency, that is, judging as a leak. Valve leakage judging mechanism, the valve of the refrigerant between the temperature detected by the cooling mechanism and the temperature in the cold state reaches the set temperature.

0 \ 57 \ 57574-910807.ptc Page 7 558625 Case No. 88103850 Amendment V. Description of Invention (5) When there is a patent application status, when Lengkang is high, and the coldness and the freezing temperature reach the set temperature range medium Valve is leaking. When there is a patent application status, when the freezing is low, and the coldness and the valve of the freezing medium up to the set temperature are leaking. When there is a patent application leak, the dust is removed due to dust. When a patent application is missed, when the patent application of the dust-removing surface forced valve mechanism is a valve leak, the rate of the patent application is missing when the patent application is missing. The valve leakage judging mechanism is within the temperature difference range of the refrigerated evaporator temperature detection mechanism when the temperature detected by the evaporator temperature detection mechanism is higher than normal when the temperature is detected by the evaporator temperature detection mechanism when it is frozen. This is the refrigerator in the cold range of the valve mechanism to the refrigerating evaporator item 6. The valve leakage judging mechanism is a warm evaporator when the temperature detected by the refrigerating evaporator temperature detecting mechanism is higher than normal when the freezing evaporator temperature detecting mechanism is in a frozen state. Within the temperature difference range when the temperature detection mechanism is in a refrigerated state, that is, the refrigerator that is determined to be the cooling range of the valve mechanism to the refrigerating evaporator item 7; the valve leakage determination mechanism determines that the valve is blocked in the valve mechanism, and the dust removal mechanism forces the valve For the refrigerator of the mechanical item No. 8 in the scope, the valve leakage judging mechanism judges that the valve removing mechanism increases the operating frequency of the compressor on the one hand. Work blown dust. The dust removal device surrounding item 9 is judged by the valve leakage judging mechanism. The dust removal mechanism on the one hand increases the operating frequency of the compressor and switches the stop valve mechanism in the refrigerant passage to remove dust. For refrigerators in the range of item 10, the valve leakage judging mechanism judges that the valve removing mechanism shortens the working time to force the valve mechanism to remove dust. Forced valve for refrigerator and dust removal mechanism with patent application No. 11

0 \ 57 \ 57574-910807.ptc Page 8 558625 _Case No. 88103850_ Year Month Revision _ V. Description of the invention (6) When the valve leakage judging mechanism judges the valve leakage again after the structure works, in order to prevent evaporation for freezing The frosting of the evaporator and the refrigerating evaporator performs the valve defrost operation. For refrigerators and defrost control mechanisms that have the scope of application for patent No. 12, when the valve leakage judgment mechanism judges the valve leakage at 3 degrees after the defrost operation, the defrost operation interval between the freezing evaporator and the refrigerating evaporator is determined. The defrost interval of the refrigerating evaporator is shorter than before. [Embodiment of Invention] The refrigerator 10 according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic longitudinal sectional view of the refrigerator 10 and an explanatory diagram of the electrical system. FIG. 2 is an explanatory diagram of a refrigeration cycle of the refrigerator 10. First, it will be described with reference to FIG. 1. Inside the cabinet 12 of the refrigerator 10, there are provided from the upper section: a refrigerating compartment 14; a vegetable compartment 16; and a freezing compartment 18. The freezing compartment 18 is provided with an ice-making device (not shown). At the bottom of the back of the freezer compartment 18, a machine compartment 22 for installing a compressor 20 is provided. A freezer evaporator (hereinafter referred to as the F evaporator) 2 4 is installed behind the freezer compartment 18, and a fan for the freezer compartment (hereinafter referred to as the F evaporator 24) is provided above the F evaporator 24 to supply the cold air generated by the F evaporator 24 to the freezer compartment. Called F fan) 26. Below the F evaporator 24, a defrosting heater (hereinafter referred to as an F defrosting heater) 28 for defrosting the F evaporator 24 is provided. An F evaporator sensor 30 for detecting the temperature of the F evaporator 24 is provided near the upper part of the F evaporator 24. A freezer compartment temperature sensor (hereinafter referred to as an F sensor) 32 for measuring the temperature in the refrigerator is installed in the freezer compartment 18. There is an evaporator for the refrigerating compartment (hereinafter referred to as the R evaporator) on the back of the green vegetable room 16 and a refrigerating compartment fan (hereinafter referred to as the R fan) 3 6 is installed above the R evaporator 34. The temperature of the R evaporator 34 is also detected.之 R evaporator sensor 38. R evaporator 34

0 · \ 57 \ 57574-910807.ptc page 9 558625 correction

Defrost heater for defrost of evaporator 34 (hereinafter referred to as r defrost heating 2; ^ ^ ^ ^ ^ t ^ ^ ^ 5 | ij

_88j ^ 〇385Q V. Description of the invention (7) and R sensor 42, connected to 6 dagger \ sensor 38, R defrost heater 4. The control device 44 is composed of i-chip substrate J ::, f. The control device ". The control device 44 is connected to the top of the back of Maida 2 of the compressor 20. It also controls the second, according to Figure 1 $ HB, person γ 'via F The evaporator 24 is cold; Π 凊 -shaped. Circulation. It is again loaded with air and is sent to the cold by the F fan 26; the cold air in the inner room 16 of the east room 18 and the refrigerating room 14 and is cooled by the R fan 36 Next to Qingcai, the structure of the cold cycle is explained according to Figure 2. The compressor 20 is connected to A, and the valve 68 is divided into two branches =, and the condenser 46 is connected to the three-way valve 68. From three (below) Called R capillary) 5 (/ * MEDIA; one of the two ways is connected to the cold U of the other side of the refrigerator with a capillary and connected to the R evaporator 34. It is also branched from the three-way valve 68) 52 is connected to the F ^ Capillary tube for cold chamber (hereinafter F capillary passage is combined into one compression and 4 cycles; F. Refrigerants of evaporator 24 and R evaporator 34 are followed by _ three-way valve μ according to Figure 3. Figure 3 series two-way valve 6 8 of the office & η 1 η βsheng rumor, the cross section of the first # 'coil 1 0 2, magnet 1 0 4, the plunger tube structure. The plunger 106 is equipped with a tip 108, By coil °, `` zone Two 8 ’resistance springs 1 1 2 Drive the valve body downwards due to the magnetic field of the magnet. This way, the condenser 4 is filled with the refrigerant 4 6 and the refrigerant is supplied to the evaporator 3 4. The plunger

Case No. 558625 Case No. 88103850 Amendment V. Description of the Invention (8) When the valve body 1 10 is reset, the valve body 1 10 is located at the top, and the refrigerant is supplied to the evaporator F 4 from the condenser 4 6. In the figure, figure 1 1 6 is a refrigerated valve seat, and figure 1 1 8 is a refrigerated valve seat. A. Wide leak detection method The following describes the detection method when a three-way valve 6 8 valve leak occurs in the refrigerator 10 having the above structure. That is to say, due to the structure of the three-way valve 6 8, sometimes small dust in the refrigeration cycle is caught between the valve body 1 10 and the valve seat 1 16 and 1 18, so some valve leaks sometimes occur. Therefore, the five detection methods when valve leakage occurs will be described. 1. First valve leak detection method The first valve leak detection method will be described with reference to FIG. 4. (Normal time) When the three-way valve 6 8 does not leak, when the freezer compartment 18 is cooled (hereinafter referred to as the frozen state), the R evaporator sensor rises to the temperature of the refrigerator compartment (0 ° C ~ 3 ° C) . That is, in the normal freezing state, the refrigerant evenly flows to the F evaporator 24 and not to the R evaporator 34, so that the R evaporator 34 is not cooled and becomes the same temperature as the refrigerating compartment 14. (Unusual time) However, in the frozen state, the refrigerant leaks from the valve to the R evaporator 3 4 due to the leaking refrigerant, the R evaporator 34 is cooled by the leaked refrigerant, and the detection temperature of the R evaporator sensor 38 is lowered. Does not rise to refrigerator temperature. Therefore, as shown in Fig. 4, the set value is set to a temperature slightly lower than the temperature of the refrigerating compartment as a threshold value. When the R evaporator sensor 38 does not exceed this set value, the valve leakage occurs in the judgment. (Change example)

0 \ 57 \ 57574-910807.ptc Page 11 558625 Case No. 88103850 _Ά Amendment V. Description of the Invention (9) When this judgment is made again, if the freezing state is about to end, the temperature of the R evaporator sensor 3 8 does not reach the aforementioned When the value is set, it is immediately judged as a valve leak, which may cause malfunction. Therefore, in order to prevent such erroneous operation, the temperature of the R evaporator sensor 38 before the end of the next freezing state is below the set value, and the temperature of the R evaporator sensor 38 before the third freezing state is about to end. When the temperature is below the set value, it can be determined that a valve leakage occurs in the three-way valve 6 8. The number of times is not limited to three times, but may be two or four times. 2. Second valve leak detection method The second valve leak detection method will be described with reference to FIG. 5. (Normal time) I · Three-way valve 6 8 No valve leakage occurred Normally, F evaporator sensor 3 0 is in a frozen state and refrigerated chamber 14 is cooled (hereinafter referred to as refrigerated state), the temperature difference is about 10 ~ 1 5 ° C. That is, when the refrigerant flows to the F evaporator 24, the F evaporator 24 is cooled and its temperature decreases. On the one hand, because the temperature of the refrigerant does not flow to the F evaporator 24, the temperature difference is about 10 to 15 t. (Unusual) However, when the refrigerant starts to leak to the F evaporator 24 side in the refrigerated state, the temperature of the F evaporator 24 decreases, the detection temperature of the F evaporator sensor 30 decreases, and the temperature difference between the frozen state and the refrigerated state Zoom out. Therefore, when the temperature difference is equal to or less than the set temperature difference, it is determined that refrigerant has leaked from the F evaporator 24. (Modification) The valve leak detection is also the same as the first detection method, and the valve leak may be determined only when the above phenomenon occurs three times. 3. The third valve leak detection method

(). \ 57 \ 57574-910807.ptc Page 12 558625 _Case No. 881〇3spin V. Description of the invention (10) Month and month Hair trimming Next, the third valve leak detection method will be described with reference to FIG. 6. (Normal time) When the three-way valve 6 8 is not leaking, the evaporator sensor 3 8 rises to the refrigerating temperature (0 to 3 t) when it is in a frozen state. That is, because the refrigerant does not flow to the R evaporator 34 at all in the frozen state and is not cooled, the temperature is the same as that in the refrigerator 14. (When abnormal)

However, in the refrigerated state, the refrigerant starts to leak to the R evaporator 34. Due to the cold air, the temperature of the R evaporator 34 decreases, and the temperature of the R evaporator sensor 38 decreases, and does not rise to the temperature of the refrigerator compartment 14. When the set value is set at a temperature slightly lower than the temperature of the refrigerator compartment, the temperature of the R evaporator sensor 38 is below the set value. In addition, the operating frequency of the compressor 20 is insufficient due to the valve leakage caused by the R evaporator 34, and the operating frequency is increased to make up for the lack of energy. Therefore, when the detected temperature of the R evaporator sensor 38 is below the set value 'and the operating frequency of the compressor 20 is higher than the set frequency, it is determined that cold air is leaking to the R evaporator 34. Therefore, the valve leak can be judged more painfully than the first valve leak detection method. (Modification) The valve leak detection is also the same as the first detection method, and the valve leak may be determined only when the valve leakage occurs three times in succession. 4. The fourth valve leak detection method

Next, a fourth wide leak detection method will be described with reference to FIG. 4. (Normal operation) 4 Three-way valve 6 8 No valve leakage occurred. Normal operation: R Evaporator sensor 3 8 The detection temperature in the frozen state rises to the refrigerated temperature (0 ° C ~ 3 ° C). For this reason

〇- \ 57 \ 57574-910807.ptc Page 13 558625 Amendment No. 88103850 V. Description of the invention (π) The refrigerant does not flow to the R evaporator 34 and the temperature of the R evaporator 34 rises. (Unusual) In the freezing state, the refrigerant starts to leak to the R evaporator 34, but the temperature of the R evaporator 34 decreases, and the temperature of the R evaporator sensor 38 decreases, and does not rise to the temperature of the refrigerator compartment. Therefore, the temperature difference between the temperature detected by the R evaporator sensor 38 in the refrigerated state and the temperature detected in the frozen state is reduced. Therefore, when the temperature difference is equal to or less than the set temperature difference, it is determined that the refrigerant leaked from the R evaporator 34 in the frozen state. (Modification) The valve leak detection is also the same as the above-mentioned detection method, and it may be judged as a wide leak only when three consecutive occurrences. 5. Fifth valve leak detection method A fifth valve leak detection method will be described with reference to FIG. 7. (Under normal condition) Three-way valve 6 8 No valve leakage occurred. Normally, the detection temperature of F evaporator sensor 30 in the frozen state drops to about _ 30 ° C. That is, because the refrigerant does not flow to the R evaporator 34 at all and the refrigerant only flows to the F evaporator 24, the temperature is lowered. (Unusual) In the frozen state, the refrigerant starts to leak to the R evaporator 34, and the F evaporator 24 is not completely cooled, the detection temperature of the F evaporator sensor 30 rises, and the F evaporator in the refrigerated state detects The temperature difference between the detection temperature of the device 30 and the detection temperature of the frozen state is reduced. Therefore, when the temperature difference is equal to or lower than the set temperature difference, it is determined that the refrigerant leaked from the R evaporator 34 in the frozen state. (Modification) This test is also the same as the above-mentioned test method, and only occurs 3 times in a row.

〇- \ 57 \ 57574-910807.ptc Page 14 558625 Case No. 88103850 Amendment V. Description of the Invention (12) Only the valve leakage can be judged. With the above-mentioned valve leakage detection method, it can be surely detected whether the three-way valve 68 has a valve leakage. B. Method for removing dust Next, the control method for removing dust when the cause of the valve leakage of the three-way valve 68 is judged is explained. 1. The first method of removing the three-way valve 6 8 The first method of removing dust when a valve leak occurs, that is, using a spiral tube to force the plunger 106 to work, and the valve body 1 1 0 to be forced to work to remove the adhered to its surroundings. dust. 2. The second removal method, the second removal method, that is, the first removal method plus increasing the operating frequency of the compressor 20, increasing the refrigerant pressure flowing into the three-way valve 68, and increasing the circulation amount to increase the dust on the valve body 1 10 The flow rate of the refrigerant near the adhesion part blows away dust. Since only the valve body is forced to operate and the dust is blown off with the refrigerant, the dust can be reliably removed. 3. The third removal method The third removal method is to stop the valve body 1 1 0 at the intermediate point when a valve leak is detected, so that the refrigerant flows to both sides. In this state, increase the operating frequency of the compressor 20, increase the pressure and increase the circulation, so as to increase the flow rate of the refrigerant near the dust attachment portion of the valve body 1 10 and blow off the dust. 4. Fourth Removal Method The first and second dust removal methods take about 4 seconds to operate the valve body 1 10 (plunger 106), but the voltage is increased to make it work for about 1 second in order to speed up. As a result, the valve body 110 is operated sharply, and the impact force of the valve is strengthened to make it easy to remove dust.

0 \ 57 \ 57574-910807.ptc Page 15 558625 Case No. 88103850 Amendment V. Description of the Invention (13) C. Control method of valve leakage defrost Secondly, according to the flowchart of Fig. 8, although the valve leakage is detected, the above is implemented Valve leakage defrost control method when dust removal control still cannot be removed. In step 1, check whether the valve leakage occurs as described above. If valve leakage occurs, go to step 2. When valve leakage does not occur, normal operation is resumed. In step 2, implement the dust removal control method described above, remove the dust, and move to step 3. In step 3, judge whether the valve leak is detected again. If no leak is detected, normal operation will be resumed. If a valve leak is detected (that is, the valve leak is detected 2 times in total), go to step 4. In step 4, the F evaporator 24 and R evaporator 34 are cooled to more than necessary due to the leakage of the 2 degree detection valve, and there is a possibility of frost. Therefore, the defrost of the F evaporator 24 and the R evaporator 34 is implemented. Go to step 5. In step 5, when valve leakage is detected after the defrost is finished (ie, the valve leakage is detected 3 times in total), go to step 6, if the valve leakage is not detected, normal operation will be resumed. In step 6, because the 3 degree detection valve leaks, the defrost control interval of the R evaporator 34 is converted to the defrost interval of the F evaporator 24. This is because the defrosting operation interval of the R evaporator 34 is greater than the defrosting operation interval of the F evaporator 24 during normal operation, so when the defrosting operation interval of the R evaporator 34 is performed, there is a possibility of frost formation. Therefore. On the one hand, from this point of view of the defrost control method, the R evaporator 34 will cause excessive frosting due to valve leakage. The frost formation due to valve leakage is judged as the frost formation during normal operation, and the same defrosting control is performed as the normal operation, that is, the above defrosting operation is required. Therefore, when detecting such a valve leak at 3 degrees, the defrost operation interval of the R evaporator 34 is used as the defrost operation interval to distinguish the valve leak detection from the frost formation.

U '^' 7'57574-910807.ptc Page 16 558625 _Case No. 88103850_ Year Month Day__ V. Description of the invention (14) Detection, but also has the effect of preventing excess defrost control. In addition, the refrigerator 10 of the above embodiment is described in accordance with the refrigeration cycle shown in FIG. 2, but instead, as shown in FIG. 9, the refrigeration cycle can also be implemented at different positions of the F evaporator 24. [Effects of the Invention] As described above, the refrigerator of the present invention can surely detect a valve leak and easily remove the cause dust when a valve leak occurs. [Brief description of the drawings] FIG. 1 is an explanatory diagram of a refrigerator in the present embodiment. Fig. 2 is an explanatory diagram of a refrigeration cycle. Figure 3 is a longitudinal sectional view of a three-way valve. Fig. 4 a and b are explanatory diagrams of the valve leak detection methods of the first and fifth. Fig. 5 a and b are explanatory diagrams of the second valve leak detection method. Figure 6 a, b, and c are explanatory diagrams of the third valve leak detection method. Fig. 7 a and b are explanatory diagrams of the fifth valve leak detection method. Fig. 8 is a flowchart of the control state of the defrosting operation when detecting a wide leak. FIG. 9 is an explanatory diagram of a modification example of the refrigeration cycle. [Illustration of drawing number] 10 .... Refrigerator 2 0 · ... Compressor 24 · ..F Evaporator 3 0 .... F Evaporator Sensor 3 4 .... R Evaporator 3 8 .... R evaporator sensor 4 4 ... control device

()-\ 57 \ 57574-9lQ807.ptc Page 17 558625 Case No. 88103850_ Year Month Amendment V. Description of Invention (15) 68 .... Three-way valve

IBII Page 18 O: \ 57 \ 57574-910807.ptc 558625 _Case No. 88103850_Year Month Day_Amendment

O: \ 57 \ 57574-9K3807.pto Page 19

Claims (1)

558625 Amendment No. 88103850 6. Scope of patent application 1. A refrigerator should be a freezer in a refrigerator. The features of a throttling machine for freezing are cold; the application for a special evaporation leak detection tester for the application of a special evaporation leak detection test for the east is used. The temperature structure for the special application of the leak detection and detection of frequency application, corresponding to the refrigerating state of the refrigerator, and borrowing it, and 2. If the refrigerating valve testing mechanism is used to store steam 3 · If the refrigerating valve testing mechanism rfj is set to leak the valve. 4 · When measuring the status of the refrigerating valve: the compressor, the evaporator, and the device constitute the refrigerated state, and the refrigerant is sent to the refrigerating unit and only the valve of the refrigerating medium of the valve mechanism leaks 1 item. Leakage below the specified temperature. Refrigerator for item 1 The temperature below the fixed temperature when evaporating and freezing for refrigerating is the valve mechanism to item 1: Refrigerating and evaporating for the refrigerating and freezing temperature in the connection room within the range of evaporating temperature for refrigerating during refrigerating The flow mechanism includes a mechanism for judging the temperature of the profit range of the evaporator, a mechanism for setting the temperature of the valve range of the refrigerant in the temperature range, and a mechanism for determining the temperature of the range of the profit range in the temperature range. It can set the condenser, the throttling mechanism for the refrigerating throttling, the cooling mechanism, and the valve path. The valve mechanism switches the refrigerant path to the evaporator side; Valve leakage judgment mechanism. The refrigerator has a detector temperature detection mechanism. When the temperature of the evaporator for refrigeration is checked, it is determined that the valve mechanism is cold. The refrigerator has a temperature detection mechanism for the evaporator. Refrigerant of evaporator for frequency refrigerating 1 Among the above-mentioned refrigerators, there is a temperature detection mechanism of the temperature detector ^ When the refrigerating evaporator temperature detector temperature detection mechanism is refrigerated, it is judged that the wide mechanism is cold. 〇- \ 57 \ 57574-910807 ptc page 20 558625 case number 88103850 _η said to correct valve leakage. The freezing evaporation of the refrigerator of the first item is high when the freezing state is normal, and the temperature between the temperature and the temperature is up to the valve of the refrigerant of the setter. The freezing evaporation of the refrigerator of the first item is low when the freezing state is normal, The temperature difference between the temperature and the temperature is up to the refrigerator valve of item 1 of the setter, so that the valve mechanism works 6. The patent application scope of the refrigerating medium of the evaporator used for storage 5. If the scope of the patent application is applied, the temperature of the evaporator evaporator valve for refrigeration is leaking The temperature detected by the judging mechanism and the testing mechanism is higher than that of the freezing mechanism of the testing mechanism. The valve mechanism in the refrigerated state evaporates to the refrigerating system. 6. If the scope of the patent application is to measure the temperature of the evaporator evaporator, the temperature of the valve leaks is judged. Frozen state of the mechanism The valve mechanism in the refrigerated state of the mechanism evaporates to freezing 7. If the scope of the patent application determines that the valve is leaking, the mechanism is forcibly removed. 8. If the patent scope valve leak judgment mechanism judges the rate, it will force the valve on the one hand. 9. If the patent scope valve leak judgment mechanism judges it as the rate, on the one hand, it is switching to cold, where the aforementioned refrigerator has a detector temperature detection mechanism. The freezing evaporator temperature is detected, and the freezing evaporator temperature is within the temperature detection temperature range of the freezing evaporator temperature. The refrigerator has a detector temperature detecting mechanism. When the temperature of the evaporator for freezing is detected and the temperature of the evaporator for freezing is detected within the temperature range, it is judged to be a leak. Including: Valve leakage judging mechanism Removes dust from valve mechanism. The refrigerator of item 7, wherein the dust removing mechanism improves the operation frequency of the compressor when the valve is leaking. In the refrigerator of item 7, when the valve is leaking, on the one hand, the valve mechanism is stopped to stop the valve mechanism in the operating medium path of the compressor. 0 \ 57 \ 57574-910807.ptc Page 2 [Page 558625 Amendment No. 88103850 6. Scope of patent application I 0. For refrigerators with scope of patent application No. 7 in which the dust removal mechanism is judged by the valve leakage judging mechanism as a valve leakage It shortens the valve mechanism to make it work than usual. II. The refrigerator according to any one of claims 7 to 10 of the scope of patent application, including: after the dust removal mechanism removes the dust, the valve leakage determination mechanism judges the valve leakage again, and performs the freezing evaporator and the refrigerating evaporator. Defrost control mechanism for valve leak defrost operation. 12. The refrigerator according to item 11 of the scope of patent application, wherein the defrost control mechanism controls the defrost operation interval of the refrigerating evaporator in a normal state to be shorter than the defrost operation interval of the refrigerating evaporator, and the valve leaks. When the valve leakage determination mechanism further determines that the valve is leaked after the defrosting operation, the defrost operation interval between the freezing evaporator and the refrigerating evaporator is set to the defrost interval of the freezing evaporator. _ 〇 \ 57 \ 57574-910807 ptc page 22