JP2014006016A - Heat pump type heat source machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump type heat source machine in which a waterproof performance is improved without newly adding a rainproof plate or a drip-proof member, and to provide a heat pump type heat source machine in which safety in construction or conveyance is improved.SOLUTION: A heat pump type heat source machine 3 uses a combustible refrigerant and comprises an evaporator fan 19 and a gas sensor 48 for detecting leakage of the combustible refrigerant within an exterior case 25. When the leakage of the combustible refrigerant is detected by the gas sensor 48, the evaporator fan 19 is driven, outside air is taken in from an opening part 51 provided in the exterior case 25, and the leaked combustible refrigerant is diffused. On a side surface of the exterior case 25, a pipeline cover 52 is mounted for covering a pipeline connecting part 50 to which a pipeline from the outside is connected, and inside the pipeline cover 52, the opening part 51 is provided in the exterior case 25.

Description

  The present invention relates to a heat pump heat source device, and more particularly to a heat pump heat source device capable of preventing rain water, dust, and the like from entering through an opening for ventilation as much as possible when driving a blower fan to take outside air into an exterior case.

  Conventionally, a hot water storage type heat pump type hot water supply apparatus has been put to practical use as a hot water storage type hot water supply apparatus. This type of heat pump type hot water supply apparatus has a large capacity hot water storage tank for storing hot water and a heat pump type heat source device having a heat pump circuit housed in an outer case, and uses hot power at night discount to save hot water. The hot water in the tank is circulated and heated by a heat pump heat source machine, and the heated hot water is stored in a hot water storage tank and supplied to a desired hot water supply destination such as a faucet or bath.

  In the above heat pump heat source machine, a compressor, a condenser, an expander, and an evaporator are connected via a refrigerant pipe to form a heat pump circuit, and a hot water supply heating operation using a combustible refrigerant enclosed in the refrigerant pipe Is done. In this hot water supply heating operation, the compressor and the blower fan for the evaporator are driven, and heat is exchanged between the refrigerant and the hot water by the condenser to heat the hot water.

  By the way, in order to ensure safety when using a flammable refrigerant in a device that uses a flammable refrigerant (e.g., a hydrocarbon-based refrigerant) as a refrigerant such as an air conditioner or a refrigerator without being limited to a heat pump heat source machine, A gas sensor capable of detecting leaked combustible refrigerant is installed. When the gas sensor detects the leakage of the combustible refrigerant, the blower fan is driven to take in the outside air into the outer case and diffuse the leaked combustible refrigerant.

  Generally, in order to take outside air into the outer case and diffuse the flammable refrigerant, the outer case is provided with an opening for ventilation in addition to the opening for heat exchange. For example, the air conditioner of Patent Document 1 includes an outer case that houses various devices, and includes a heat exchange chamber, a compressor, and a condenser in which the blower fan and the evaporator are arranged by a partition plate inside the outer case. A plurality of horizontal slits (so-called galleys) are provided as openings for ventilation on the piping cover attached to the machine room side front surface or side surface of the exterior case or the machine room side surface. Is formed.

JP-A-11-94291

  However, in the structure of the ventilation opening of Patent Document 1, since the plurality of slits constituting the opening are directly exposed to the outside, the blower fan is driven to take outside air into the outer case In addition, there is a problem that rainwater, dust and the like easily enter the outer case.

  For this reason, generally, a partition plate (rainproof plate) is disposed in the exterior case so as to face the ventilation opening so that rainwater, dust, and the like do not enter from the ventilation opening. However, if a rainproof plate or drip-proof member is added to the exterior case, the manufacturing cost will increase, but if the rainproof plate or drip-proof member is omitted, the intrusion of rainwater or the like into the exterior case will increase as described above. Resulting in.

  In addition, the plurality of slits formed in the exterior case such as the ventilation opening in Patent Document 1 are often formed by cutting out toward the outside of the case, and the slit edges are used during construction or transportation. There is a risk that the operator may be injured and there is a problem with safety.

  The present invention provides a heat pump heat source machine that improves the waterproof performance without newly adding a rainproof plate, a drip-proof member, etc., and a heat pump that improves safety during construction and transportation Providing a heat source machine.

  The heat pump heat source apparatus according to claim 1 is a heat pump heat source apparatus that uses a combustible refrigerant and has an evaporator fan and a gas sensor that detects leakage of the combustible refrigerant in an exterior case, In the heat pump type heat source device, when the leakage of the combustible refrigerant is detected, the evaporator fan is driven to take outside air from the opening provided in the outer case and diffuse the leaked combustible refrigerant. A pipe cover that covers a pipe connection portion to which pipes from the outside are connected is attached to a side surface of the case, and the opening is provided in the exterior case inside the pipe cover.

  The heat pump heat source machine according to claim 2 is characterized in that, in the invention according to claim 1, the opening is provided below the pipe connection part.

  According to a third aspect of the present invention, there is provided a heat pump heat source apparatus according to the first or second aspect, wherein the opening is formed by a plurality of cut and raised pieces cut and raised toward the inside of the exterior case. It is composed of horizontal slits.

  According to the invention of claim 1, a pipe cover that covers a pipe connection portion to which pipes from the outside are connected is attached to the side surface of the outer case, and an opening is provided in the outer case inside the pipe cover. Therefore, the opening is covered with the pipe cover so that it is not directly exposed to wind and rain. Therefore, since it becomes a structure in which rainwater and dust do not easily enter the exterior case, the waterproof performance can be improved and the manufacturing cost can be improved without adding a rainproof plate, a drip-proof member, etc. in the exterior case. Can be suppressed.

  According to the invention of claim 2, since the opening is provided below the pipe connecting portion, the outside air taken into the outer case flows in the vicinity of the lower portion in the outer case. Therefore, it becomes a structure where it is difficult for outside air to directly touch various pipes and various devices in the outer case, and wasteful heat dissipation can be prevented. When the flammable refrigerant leaks, the flammable refrigerant heavier than the specific gravity of the air stays in the vicinity of the lower portion in the outer case, so that the flammable refrigerant can be efficiently diffused by the taken-in outside air. If water stays inside the pipe cover due to water leakage from the pipe connection or rainwater, etc., the remaining water flows into the outer case through the opening, and the bottom of the outer case It can be discharged from the outlet.

  According to the invention of claim 3, since the opening is composed of a plurality of horizontal slits formed through a plurality of cut and raised pieces cut and raised toward the inside of the exterior case, It is possible to reduce the possibility of an operator being injured by the edge of the slit during transportation and to improve safety during construction and transportation.

It is a schematic block diagram of the heat pump hot-water supply apparatus provided with the heat pump type heat source apparatus which concerns on the Example of this invention. It is a perspective view of a heat pump type heat source machine. It is a perspective view of the heat pump type heat source machine in the state where the front side plate of the exterior case and the piping cover are removed. It is a front view of the heat pump type heat source machine of the state which removed the front side board and piping cover of the exterior case. It is a principal part expanded sectional view of a heat pump type heat source machine. It is a section expanded sectional view of FIG.

  Hereinafter, modes for carrying out the present invention will be described based on examples.

First, the whole structure of the heat pump hot water supply apparatus 1 is demonstrated.
As shown in FIG. 1, a heat pump hot water supply apparatus 1 includes a hot water storage tank unit 2 having a large capacity hot water storage tank 12 for storing hot water, a heat pump heat source device 3 having a heat pump circuit, a hot water storage tank unit 2 and a heat pump heat source device. 3 is composed of hot water circulation pipes 9a and 9b for circulating hot water between them.

Next, the hot water storage tank unit 2 will be described.
As shown in FIG. 1, the hot water storage tank unit 2 includes a hot water storage tank 12 having a vertically long cylindrical outer peripheral surface, various pipes 6, 7, 8, 9a, 9b, 10, a main control unit 11, an outer case 14, and the like. I have. The hot water storage tank 12 stores high-temperature hot water heated by the heat pump heat source unit 3, and is made of a stainless steel plate material having excellent corrosion resistance.

  A lower pipe 8 connected to a water supply pipe 7 such as a water pipe and a hot water circulation pipe 9 a is connected to the lower end of the hot water storage tank 12. The water supply pipe 7 is provided with an open / close valve 15 for replenishing the hot water storage tank 12 with tap water. Normally, the open / close valve 15 is opened so that the hot water storage tank 12 is replenished with tap water. It has become.

  Hot water (reserved water) is sent from the hot water storage tank 12 to the heat pump heat source unit 3 through the lower pipe 8 and the hot water circulation pipe 9a through the liquid feed pump 16. The hot water heated by the hot water heating heat exchanger 21 of the heat pump heat source unit 3 flows into the hot water circulation pipe 9b.

  An upper pipe 10 connected to the hot water circulation pipe 9 b and the hot water discharge pipe 6 is connected to the upper end of the hot water storage tank 12. The upper pipe 10 is provided with an on-off valve 17. Normally, the on-off valve 17 is opened, and hot hot water (for example, 80 to 90 ° C.) returned from the hot water circulation pipe 9b through the upper pipe 10 can be stored in the hot water storage tank 12, When hot water is supplied, hot hot water in the hot water storage tank 12 can be supplied to the upper pipe 10.

  The heat insulating material 13 covering the outer surface side of the hot water storage tank 12 is made of, for example, a foam heat insulating material obtained by foaming a resin such as expanded polypropylene or expanded polystyrene, and is stored in the hot water storage tank 12 while covering the outer surface side of the hot water storage tank 12. It has a heat insulation function to prevent the temperature drop of hot water.

  In the hot water storage tank 12, a plurality of temperature sensors 31 to 34 are arranged at predetermined intervals in the height direction. The temperature sensors 31 to 34 are connected to the main control unit 11, and temperature detection signals from the temperature sensors 31 to 34 are supplied to the main control unit 11.

  The outer case 14 is formed in a thin steel plate box shape, and includes a main control unit 11, a hot water storage tank 12, pipes 6, 7, 8, 10, most of hot water circulation pipes 9 a, 9 b, a liquid feed pump 16, The on-off valves 15 and 17, the mixing valve 27, a plurality of temperature sensors 28 to 30 and the like are accommodated.

Next, the heat pump heat source machine 3 will be described.
As shown in FIGS. 1 to 6, the heat pump heat source unit 3 includes an outside air heat absorption heat exchanger 18 as an evaporator, a compressor 20, a hot water heating heat exchanger 21 as a condenser, and a high pressure. And an expansion valve 22 that rapidly expands the refrigerant to lower the temperature and pressure. These devices 18, 20, 21, and 22 are connected via a refrigerant pipe 23 to form a heat pump circuit, and are accommodated in the refrigerant pipe 23. Hot water heating operation is performed using the refrigerant.

  The heat pump heat source unit 3 further includes an evaporator blower fan 19 driven by a blower motor 19a, an auxiliary control unit 24 connected to the main control unit 11 and controlling the heat pump heat source unit 3, and leakage of flammable refrigerant. A gas sensor 48 capable of detecting the above, an outer case 25 for storing them, and the like.

  As shown in FIGS. 2 to 6, the exterior case 25 is formed in a box shape made of a thin steel plate, and includes a pair of left and right side plates 35, 36, a front side plate 37, a rear side plate 38, a top plate 40, And a bottom plate 41. In the exterior case 25, a vertical vertical partition plate 42 and a horizontal horizontal partition plate 43 are provided, each of which is made of a thin steel plate.

  The pair of left and right side plates 35 and 36 are respectively configured in an L shape in plan view, and are installed symmetrically. A pipe cover 52 having a bulged lower side is attached to the cover attachment portion 36 a of the right side plate 36, and the pipe connection portion 50 of the right side plate 36 is covered by the pipe cover 52. In addition, the structure of the piping connection part 50 and the piping cover 52 is mentioned later.

  The front side plate 37 is formed with an opening 37a as an air discharge port for discharging the air in the outer case 25, and a wire net-like cover member 37b is provided on the front surface of the opening 37a. On the inner surface side of the front side plate 37, a bell mouth 37c for guiding the air flow is provided. When the blower fan 19 is driven, outside air is taken in through large rectangular openings formed in the left side plate 35 and the rear side plate 38, respectively, and heat is exchanged with the refrigerant in the outside air heat absorption heat exchanger 18 to become low-temperature air. Then, it is discharged to the outside through the front opening 37a.

  The vertical partition plate 42 is vertically erected from about 右側 of the right side of the bottom plate 41 and is provided substantially in parallel with the pair of left and right side plates 35, 36. The vertical partition plate 42 includes a left blower chamber 44 in which the outside air heat absorption heat exchanger 18, a blower fan 19, and the like are disposed in the exterior case 25, and a right machine in which the compressor 20, the expansion valve 22, and the like are disposed. The room 45 is partitioned. An auxiliary control device 24 is attached to the upper end side portion of the vertical partition plate 42. Note that a gap is formed between the vertical partition plate 42 and the bottom plate 41 for forming an air flow from the machine chamber 45 side to the blower chamber 44 side.

  The horizontal partition plate 43 is provided on the upper side of the vertical partition plate 42 so as to extend in the left-right direction in parallel with the top plate 40. The left and right ends of the horizontal partition plate 43 are fixed to the inner surfaces of the left and right side plates 35, 36. The upper end side portion in the outer case 25 is partitioned.

  The blower fan 19 (corresponding to an evaporator fan) includes a blower motor 19a and a plurality of blade members 19b that are rotationally driven by the blower motor 19a, and a bottom plate 41 and a horizontal partition plate via a support fitting 19c. 43. The compressor 20 is a known hermetic compressor that adiabatically compresses a refrigerant in a gas phase state to increase the temperature.

  The heat exchanger 18 for absorbing outside air heat is configured in an L shape in plan view so as to follow the inner surfaces of the left side plate 35 and the rear side plate 38. The outside air heat absorption heat exchanger 18 includes an evaporator passage portion 18a included in the refrigerant pipe 23. The evaporator passage portion 18a includes a plurality of fins. In the outside air heat absorption heat exchanger 18, Heat is exchanged between the refrigerant flowing through the evaporator passage portion 18a and the outside air, and the refrigerant absorbs heat from the outside air and vaporizes.

  The heat exchanger 21 for heating hot water is covered with a foam heat insulating material 49 formed by foam molding a resin such as foamed polypropylene or foamed polystyrene. The hot water heating heat exchanger 21 is disposed on the upper surface side of the horizontal partition plate 43. The foam heat insulating material 49 has a heat insulating function for the hot water heating heat exchanger 21 to efficiently exchange heat.

  The hot water heating heat exchanger 21 is constituted by a copper double pipe having a heat exchanger passage portion 21 a and an internal passage 21 b which is a part of the refrigerant pipe 23. In this hot water heating heat exchanger 21, heat is exchanged between the refrigerant flowing in the internal passage 21b and hot water supplied from the hot water circulation pipe 9a to the heat exchanger passage 21a, and the hot water is heated and the refrigerant is cooled. Liquefaction.

  The expansion valve 22 adiabatically expands the refrigerant in the liquid phase to lower the temperature. The expansion valve 22 is a control valve having a variable throttle amount. Instead of the expansion valve 22, an expansion valve with a constant throttle amount may be employed.

  The refrigerant pipe 23 includes a refrigerant pipe 23a that connects between the heat exchanger 18 for absorbing outside air heat and the compressor 20, a refrigerant pipe 23b that connects between the compressor 20 and the heat exchanger 21 for heating hot water, and a heat exchanger for heating hot water. 21 and a refrigerant pipe 23c for connecting the expansion valve 22 and a refrigerant pipe 23d for connecting the expansion valve 22 and the heat exchanger 18 for absorbing outside heat (see FIG. 1).

  The gas sensor 48 is installed in the lower part of the machine room 45 of the heat pump heat source unit 3 in consideration that the combustible refrigerant is heavier than the specific gravity of air. If a flammable refrigerant leaks, the gas sensor 48 detects the leaked refrigerant, sends a detection signal to the auxiliary control unit 24 and drives the blower fan 19 to notify the user, so that the heat pump heat source unit 3 Can be secured.

  In the heat pump heat source unit 3, the heated combustible refrigerant compressed to a high pressure by the compressor 20 is sent to the hot water heating heat exchanger 21 and driven from the lower end of the hot water storage tank 12 by the liquid feed pump 16. Heat is exchanged with the hot water or water flowing into the heat exchanger passage 21a through the pipe 8 and the hot water circulation pipe 9a to warm the hot water or water, and the heated hot water passes through the hot water circulation pipe 9b and the upper pipe 10. Then, the hot water is stored in the hot water storage tank 12 of the hot water storage tank unit 2, and high temperature hot water is stored in the hot water storage tank 12 by repeating the heating operation via the heat pump heat source unit 3.

  The main control unit 11 can perform data communication with the operation remote controller 35 that can be operated by the user. When the target hot water temperature is set by operating the switch of the operation remote controller 35, the target hot water temperature data is transferred from the operation remote controller 35. It is transmitted to the main control unit 11.

  When the user performs a hot water supply operation, the hot water stored in the hot water storage tank 12 flows into the hot water supply pipe 6, and the hot water and the tap water supplied from the water supply pipe 7 are mixed by the mixing valve 27 to reach a predetermined temperature. The hot water is supplied to the hot water tap 4 such as a faucet. Temperature sensors 28 to 30 for detecting the hot water temperature or the incoming water temperature are provided in the upstream portion, the downstream portion of the mixing valve 27, and the middle portion of the water supply pipe 7, respectively. It is supplied to the main control unit 11. The main control unit 11 adjusts the temperature of the hot water to be supplied by controlling the mixing valve 27 and adjusting the mixing ratio of the hot water and water based on the temperature detection data detected by these temperature sensors 28-30. Hot water.

  Further, during the hot water supply heating operation, the main control unit 11 determines the heating temperature for heating the hot water by the heat pump heat source unit 3 based on the target hot water supply temperature data and the temperature detection data from the temperature sensors 31 to 34, and performs auxiliary control. Instruct unit 24 of the heating temperature.

  The auxiliary control unit 24 is capable of data communication with the main control unit 11, and controls the drive of various devices (such as the blower motor 19 a and the compressor 20) of the heat pump heat source unit 3 in accordance with instructions from the main control unit 11. Do. At the outlet side portion of the hot water heating heat exchanger 21, the hot water circulation pipe 9 b is provided with a temperature sensor 26 for detecting the hot water temperature, and the detection signal is supplied to the main control unit 11, and the auxiliary control unit 24. Receives the command temperature and the temperature detection data from the main control unit 11, and operates the heat pump heat source unit 3 so that the heating temperature of the hot water becomes the commanded temperature.

  Further, when the auxiliary control unit 24 detects the leakage of the flammable refrigerant by the gas sensor 48, the auxiliary control unit 24 drives the blower fan 19 to take outside air into the outer case 25 regardless of the operation state of the heat pump hot water supply device 1. The leaked combustible refrigerant is diffused, and a combustible refrigerant leak notification command signal is transmitted to the main control unit 11 to notify the user of the leak of the combustible refrigerant by the notification means.

Next, the opening 51 according to the present invention and the piping cover 52 covering the opening 51 will be described.
As shown in FIGS. 2 to 6, a pipe cover 52 that covers a pipe connection portion 50 to which pipes from the outside are connected is attached to the right side plate 36 that constitutes the right side surface of the exterior case 25. An opening 51 is provided on the inner side. The opening 51 is provided below the pipe connection portion 50 provided in the right side plate 36 and at the lower end portion of the right side plate 36.

  The pipe connection portion 50 is provided at the lower portion of the right side plate 36, protrudes slightly outward from the surface of the cover attachment portion 36a, and is formed in a rectangular shape in a side view. The pipe connection part 50 includes a pair of joints 50a and 50b for connecting the pipe part outside the heat pump heat source unit 3 and the pipe part inside the heat pump type heat source unit 3 of the hot water circulation pipes 9a and 9b. . The pair of joints 50a and 50b have the same shape provided with drain plugs 50c.

  As shown in FIGS. 2 and 5, the pipe cover 52 includes a lower pipe housing portion 52a, a vertical plate portion 52b extending upward from the upper end of the pipe housing portion 52a, and an upper end portion of the vertical plate portion 52b. The upper end protruding portion 52c that is formed and protrudes in the horizontal direction and the outer peripheral flange portion 52d that covers these peripheral portions are integrally formed. The piping cover 52 is formed in a substantially b-shape when viewed from the front, and is formed in a vertically long rectangular shape when viewed from the side. In the piping cover 52, a plurality of engaging portions formed on the back surface side (right side plate 36 side) of the outer peripheral flange portion 52d are engaged with engaged portions of the cover mounting portion 36a of the right side plate 36 via a plurality of screws. The right side plate 36 is fixed.

  A pair of joints 50a and 50b are housed in the pipe housing portion 52a. A pipe insertion port 52e is formed in the rear side surface portion of the pipe accommodating part 52a, and ends of pipe parts outside the heat pump heat source unit 3 of the hot water circulation pipes 9a and 9b are respectively inserted into the pipe insertion holes 52e. A pair of corresponding joints 50a and 50b are connected to each other.

  As shown in FIG. 6, the opening 51 is for taking outside air into the vicinity of the lower part in the machine room 45, and includes a plurality of horizontal slits 55. The plurality of horizontal slits 55 are formed through a plurality of cut and raised pieces 56 that are cut and raised toward the inside of the outer case 25 and extend in the front-rear direction. The plurality of cut and raised pieces 56 are formed in an aligned state in which four pieces are arranged at equal intervals in the vertical direction. The free end side of each cut-and-raised piece 56 protrudes inward of the outer case 25 and toward the top plate 40 side. The inclination angle of each cut and raised piece 56 is set to about 30 degrees with respect to the right side plate 36, but is not limited to this inclination angle.

Next, the operation and effect of the heat pump heat source apparatus 3 according to the present invention will be described.
As shown in FIG. 4, when air is taken into the outer case 25 as the blower fan 19 is driven, the outer case 25 passes from the opening 51 (the plurality of slits 55) through the pipe insertion port 52 e of the pipe cover 52. The air that has flowed into the interior first flows in the lower part of the machine chamber 45, then flows into the blower chamber 44 through the gap between the bottom plate 41 and the vertical partition plate 42, and passes through the opening 37a on the front side. It is discharged outside. When the flammable refrigerant leaks due to the air flowing in such a flow path, the flammable refrigerant staying in the lower part in the outer case 25 can be diffused and discharged to the outside of the outer case 25.

  According to the above description, the pipe cover 52 is attached to the side surface (the right side plate 36) of the outer case 25 so as to cover the pipe connection part 50 to which the pipes (hot water circulation pipes 9a and 9b) from the outside are connected. Since the opening 51 is provided in the exterior case 25 inside the piping cover 52, the opening 51 is covered with the piping cover 52 and is not directly exposed to wind and rain. Therefore, since it becomes a structure in which rainwater, dust, etc. do not easily enter into the exterior case 25, the waterproof performance can be improved and the manufacture thereof can be performed without adding a rainproof plate, a drip-proof member or the like in the exterior case 25. Cost can also be reduced.

  In addition, since the opening 51 is provided below the pipe connection part 50, the outside air taken into the outer case 25 flows in the vicinity of the lower part in the outer case 25. Therefore, it becomes a structure in which outside air does not directly touch various piping and various devices in the outer case 25, and wasteful heat dissipation can be prevented. When the flammable refrigerant leaks, the flammable refrigerant heavier than the specific gravity of air stays in the vicinity of the lower part in the outer case 25, so that the flammable refrigerant can be efficiently diffused by the taken-in outside air. If water stays inside the pipe cover 52 due to water leakage from the pipe connection part 50 or rain water entering, for example, the compressor in the outer case 25 through the opening 51 is used. The drain water is collected in a drain tray 20 and can be discharged to the outside through a drain plate provided in the bottom plate 41 (bottom portion) of the outer case 25.

  Furthermore, since the opening 51 is composed of a plurality of horizontal slits 55 formed through a plurality of cut and raised pieces 56 that are cut and raised toward the inside of the outer case 25, the opening 51 is configured during construction and transportation. The edge of the slit 55 can reduce the possibility that the operator will be injured and improve the safety during construction and transportation.

Next, a mode in which the above embodiment is partially changed will be described.
[1] The number and arrangement of the slits 55 constituting the opening 51 are not limited to the above-described configuration, and can be appropriately changed according to specifications.

[2] The opening 51 is provided below the pipe connection portion 50, but is not limited to this position. If the opening 51 is inside the pipe cover 52, the opening 51 is provided above the pipe connection portion 50. May be.

[3] The opening 51 is composed of a plurality of horizontal slits 55 formed through a plurality of cut and raised pieces 56 cut and raised toward the inside of the outer case 25. It is not necessary to limit to such a shape, and the plurality of cut and raised pieces 56 may be omitted, and for example, a plurality of horizontal long holes may be used.

[4] In addition, those skilled in the art can implement the present invention by adding various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. It is.

3 Heat pump type heat source machine 19 Blower fan (fan for evaporator)
25 Outer case 48 Gas sensor 50 Piping connection 51 Opening 52 Piping cover 55 Slit 56 Cut and raised piece

Claims (3)

A heat pump heat source machine that uses a flammable refrigerant and has an evaporator fan and a gas sensor that detects leakage of the flammable refrigerant in an outer case, and when the leakage of the flammable refrigerant is detected by the gas sensor In the heat pump heat source device that drives the evaporator fan and diffuses the flammable refrigerant leaked by taking in outside air from the opening provided in the exterior case,
A heat pump in which a pipe cover that covers a pipe connection portion to which pipes from the outside are connected is attached to a side surface of the outer case, and the opening is provided in the outer case inside the pipe cover. Type heat source machine.   The heat pump heat source apparatus according to claim 1, wherein the opening is provided below the pipe connection part. The said opening part was comprised by the some horizontal slit formed through the some cut and raised piece cut and raised toward the inner side of the said exterior case, The Claim 1 or 2 characterized by the above-mentioned. The heat pump type heat source machine described.